Bulletins of American paleontology (Bull. Am. paleontol.) Vol 255256

BULLETINS
OF

AMERICAN
PALEONTOLOGY

VOL. LVll

1969- 1970

Paleontological Research Institution
Ithaca,

New

York 14850
U.S.A.


MU3.

COivV.-'.

2-0011

LIBRARV

APR 27

i970

HARVARD
UNlVERSlTYi

INDEX
No separate index is included in the volume. Kach number is
indexed separately. Contents of the volume are listed in the beginning of the xolume.


CONTENTS OF VOLUME
Bulletin No.
255.

LVII

Plates

The Ammonite Fauna

Pages

of the Kialagvik

Formation at Wide Bay, Alaska PeninPart II. Sonninia Sowerbyi Zone

sula.

(Bajocian).

By Gerd

256.

E. G.

Westermann

1-226

1-47

227-321

48-62

New Middle Jurassic Ammonitina from
New Guinea.
By G. E. G. Westermann and
T.A.Getty



'z3'-B
i'-'JUS.

BULLETINS
OF

COMP.

200L'.

dec 3

'

HARVARD

AMERICAN *'""'"
PALEONTOLOGY

Vol.

57

No. 255

THE AMMONITE FAUNA OF THE KIALAGVIK
FORMATION AT WIDE BAY, ALASKA PENINSULA.
PART II. SONNINIA SOWERBYI ZONE
(BAJOGIAN)

By
Gerd

E. G.

Westermann

1969

Paleontological Research Institution
Ithaca,

U.

New York
S.

A.


PALEONTOLOGIGAL RESEARCH INSTITUTION
1968

-

1969
William

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Heroy

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Secretary

Arm and

Counsel

AAAS

Representative

S.

Harris

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Adams

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Council

Trustees

Rebecca

Daniel

Harris (Life)
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S.

Katherine V. W. Palmer (Life)
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B. Sass (1965-1971)

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Winkler (1969-1975)

(1968-1974)

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BULLETINS
OF

AMERICAN
PALEONTOLOGY
(Founded 1895)

Vol.

57

No. 255

THE AMMONITE FAUNA OF THE KIALAGVIK
FORMATION AT WIDE BAY, ALASKA PENINSULA.
PART II. SONNINIA SOWERBYI ZONE
(BAJOCIAN)

By

Gerd

E. G.

Westermann

November

20,

1969

Paleontological Research Institution
Ithaca,

New York

14850, U.S.A.


Library of Congress Catalog Card Number:

Printed

GS

in the United States of America
Arnold Printing Company

6If-135


CONTENTS
Page
Abstract

5

Preface

5

Stratigraphy

8

Upper boundary and correlation

of the Kialagvik Formation

Biostratigraphy of the Kialagvik Formation

17

Erycitoidcs hoivclli Zone

17

Sonninla soivcrbyi Zone

18

Otoites saiizei

Zone

Faunal relations and ages of the

22
iS".

soiverbyi Zone assemblages

Conclusions
Diversity
Fossil

8

30

and paleolatitude

31

localities

Systematic

32

description

36

Repository of types

Measurements

22

of

Family Phylloceratidae

36

ammonite

shells

36

Zittel

36

Genus Phylloceras Suess

36

Genus Partschiccras Fucini

38

Genus Holcophylloccras Spath

40

Family Lytoceratidae Neumayr

42

Genus Lytoccras Suess

42

Family Strigoceratidae Buckman

Genus Hcbctoxyites Buckman

44
44


Faiiiil\-

Oppeliidae

Genus
Fainil\-

Bunarelli

liraJfordiit

Hildoceratidae

47

Buckman

48

Hyatt

52

Genus Psi-udoliocnas Buckman

52

Genus Asthcnocrras Buckman

61

Famil\

Ilammatoceratidae Buckman

Genus Eudmctoccras Buckman
Appendix

:

/f//4//«/7o

nuclcospinosum Westermann, 1964

Genus Planammatoccras Buckman
Family Sonniniidae Buckman

Genus

Sonitinia Ba\le

63

72
82

90
92
92

Genus If itchrllia Buckman

108

Genus Prlrkodiifs Buckman

126

Family Otoitidae Mascke

128

Genus Docidonras Buckman

133

Genus Psrudotoilcs

157

Spath

References

166

Russian summary

172

Plates

173


.

THE AMMONITE FAUNA OF THE KIALAGVIK
FORMATION AT WIDE BAY, ALASKA PENINSULA
PART II. SONNINIA SOWERBYI ZONE (BAJOCIAN)
Gerd E. G. Westermann

McMaster University, Hamilton, Ontario

ABSTRACT
contact between Kialagvik and Shelikof Formations is now drawn at
the base of the Callovian regional unconformity; this accords with the original
definition and eliminates strong heterochroneity.
The Sori/iitiia soivcrbyi (Standard) Zone is represented by, below, at least
35
subgreywacke, greywacke, and mudstone containing the Eudmctoceras
dark shales
amplcctcns assemblage [£. amplcctcns zonule] and, above, 50-100
with concretions containing the Pseudocidoccras assemblage [Pscudocidoceras
zonule.] Part of the incompetent shales are often missing due to strike-slip
faulting above the E. amplcctcns zonule. The underlying E. hoivcHi Zone is
separated by 80-100
poorly exposed, unfossiliferous, and little investigated
unfossiliferous
elastics; the overlying 0. sauzei Zone is separated by 110-130

The

m

m

m

m

sandstone and shale.

The E. amplcctcns zonule has yielded Eudmctoceras (Euaptctoccras) amplcctcns (Buckman), Docidoccras (?), Bradfordia? (Pracoppclia) and Hcbcsoivcrbyi Zone, L. discites
toxyites and is accordingly placed in the lower
Subzone, of the lowermost Bajocian. The Pscudocidoceras zonule includes, below, Sonninia (Euhoploccrasj, Eudmctoceras klimakomphalum (Vacek), and
Docidoccras s.s. also attesting the L. discites Subzone, and, above, abundant
evolute IVitchellia indicating middle to upper S. soivcrhyi Zone.
The Ammonoidea are placed in 15 genera, none new, 13 subgenera with
three new [Sonninia ( Alaskoccras)
Docidoccras (Pscudocidoceras) , Bradfordia} (Pracoppclia)^, 30 species with 13 to 20 new of which nine are named
[Partsc/iiccras ellipticum, Pseudolioccras costistriatum, Sonninia (Euhoploceras)
bifurcata, S.
(Alaskoceras) alaskcnsis, IVitchellia sutneroides, Docidoccras
(Pscudocidoceras) luidebaycjisc, D. (P.) camac/ioi, D.? (P.?) paucinodosum,
Bradfordia} (Pracoppclia) oppeliiformisli, and tivo subspecies [Pseudolioccras
maclintocki fastigatum, Eudmctoceras (Euaptctoccras) klimakomphalum dis,

-S".

,

coidalc^.

About one-half of the Ammonitina genera and subgenera range higher
than in Europe. Affinities are closest to Europe and secondly to South America;
affinities to the Western Pacific (Western Australia and Indonesia) are weak
and could be accounted for indirectly by migration via Europe and South
America. All genera are also known from other continents and only Pseudotoitcs is restricted to the Pacific. High faunistic diversity and species distribution suggest a somewhat lower latitude or a lower temperature gradient than
at present, or a combination of both factors.

PREFACE
This is the second part of a study of the extraordinarily

rich and well-preserved ammonoid fauna from Wide Bay (formerly Kialagvik Bay) comprising the almost universal assemblage of
the Bajocian Sonninia sowerbyi Zone of the Upper Kialagvik Formation. The first part (Westermann, Bull. Amer. Paleont., vol. 47,
No. 216, 1964) dealt with the Erycitoides howelli Zone which was
correlated with the Lndwigia concava Zone of the Aalenian (formerly called Lower Bajocian)
The great bulk of the E. hoivelli fauna was believed to be endemic to Alaska and the western Canadian Arctic until recently


.

Bulletin 255

when Sey and Kaladieva
soutliern coast of the

reported the same fauna from the

(1967)

Okhotsk Sea

in

eastern

far

Siberia:

late

Toarcian sandstone with Pseudoliceras beyrichi (Schloenbach) are
overlain by approximately 480 m siltstones which bear at the base
P. inaclititocki (Haughton) s.s. of early Aalenian age, in the middle
part Erycitoides hozvelli (White)

,

E. (Kialagvikites) spinatus West-

eYn\:inn, Pseudolioceras muclintocki whiteavesi

(White)

,

P.

aff.

(?)

and Inoccranius sp., and above luocerarmis sp.
and P. (?) aff. P.m. xchitcavesi. These siltstones pass into 370 m
sandstones and siltstones with Inoceramus sp., followed by Upper

P.m.

XL'hiteavesi,

Jurassic beds with erosional luiconformity.

has for the

The

E. hoxvelli fauna

time permitted the accurate dating of the thick

first

Middle Jurassic terrigenous sequences distributed throughout
ern Siberia. Furthermore, Tmetoceros

mann

has

now

also

cf.

east-

T. flexicostatian Wester-

been reported from the southern Andes (West-

ermann, 1967)
Wliile Part

ed

Wide Bay

1

of this

monograph was

(1 ext-figs. 1,2)

in

in press, the author visit-

August of 1964

for

two weeks dur-

HubOregon State University, assisted
in the field. McMaster University and the National Research Council of Canada financed this short expedition. All transportation
was by air, with commercial airlines to King Salmon at the eastern
end of Bristol Bay and small chartered planes expertly piloted by
bush pilots, via Pilot Point at Ugashik Bay to Wide Bay making

use of the intertidal slope at Preston Creek (Camp A) and a small
ing which 10 days were suitable for field work. Mr. Phillip

bard, then a geology student at

air strip of

(Camp

B)

.

former

along the sea
Pilot Point

oil

exploration at the

After detailed

the

mouth

collecting in the

S.

of Short Creek

sowerbyi Zone

Camp A, a chartered float plane from
Camp to location B on the northwestern side

cliffs east

moved

fossil

of

where the E. Iimvelli Zone of the coastal bluffs from
Pass Creek to the head of the bay and the important sections along
Short and Anderson Creeks were re-examined. Important technical
advice and aid were given by (Charles Rowett, then at the University of Alaska, R. L. Dettcrman and T. B. Ball of the U.S. Geological Survey, Alaska Branch, and by M. V. Kirk of Shell Oil
of the bay

Company.

monograph was

de-

layed because of the necessary re-investigation and taxonomic

re-

The completion

of the second part of this


Alaskan ammonites,

Pt. II:

Westermann

Scale

Text-fig.

1.

— Index

map

in

Km

of south Alaska.

European and South American repreS. sowerbyi Zone ammonite
assemblages. Particularly the Hammatoceratidae and Sonniniidae
have been either in a state of utter taxonomic confusion as reflectvisions of the northwestern

sentatives

of

the

almost universal

NW

Eued in the classification of Buckman (1887-1907; 1909-30:
and
rope) or are poorly known with regard to range variation
affinity (South America)
Type specimens were studied in the
British Museum of Natural History and in the Geological Survey
,

.

Museum, London, with the help of M. K. Howarth and F. M.
Anderson; the subgenus Sonninia (Euhoploceras) Buckman was
thoroughly revised (Westermann, 1966) the most important classical sections in the southern Andes of Chile and Argentina were reexamined (Westermann, 1967) plastotypes of specimens described
in Tornquist's (1898) monograph were kindly sent by H. K.
;

;

Schmidt, University of Gottingen, and those of Jaworski's (1926)
monograph were sent by H. K. Erben, University of Bonn, Ger-

many. Of particular interest were the circum-Pacific genus Pseiidotoites Spath and the alleged Australian Zejnistephanus of which


Bl'lleti.x 255

plaster casts ol topotypes were liiriiished by P.
versity ol

Survey.

Western Australia, ami by R.

The author

locations of

(1933)

Lupher

also

re-examined

Bajocian section

at

in

(Coleman, Uni-

5. souwrbyi Zone
Oregon and Crickniay's

1963 the

in east-central

(1911)

}.

\V. Imlay, U.S. Geological

Moiuit [ura. California. Plastotypes of

the sonniniids from the inaccessible old collecting point at

Minewanka
furnished

i)y

in

D.

the Alberta

foothills

Frebold,

(cf.

1957a)

Lake
were

McLaren and H. Frebold, Geological Survey

of

Canada.

The author owes

sincere gratitude to R. \\. Imlay, U.S. Geo-

logical Survey, \Vashington, D.C., for

making

available to

him

all

Zone of Wide
Bay and also for fmnishing the plastotypes of all ammonites described and figined h\ him. The survey collections (USGS) were
made by Walter R. Smith in 1924, S. N. Daviess in 1944, L. B.
Kellinn in 1943 and 1915, and R. W. Imlay and Don Miller in
1948. A small collection was lent by L. G. Hertlein, of California
Academy of Sciences (C.A.S.) in San Francisco, and a few specimens were made a\ailai:)le by V. S. Mallory of the Thomas Burke
Memorial \Vashington State Museum, University of Washington
(U.W.) in Seattle. M. V. Kirk, Shell Oil Company, who loaned
the entile Aalenian and early Bajocian collections of Wide Bay
for the first part of this monograph, furnished stratigraphic information (cf. Part I) and polaroid photographs of a number of
ammonites from the S. soxvcvbyi Zone. However, most imfortiniately, the entire fossil collection had to he retmned to Shell Oil
fossil collections

Company

of the Survey from the

S.

soiverbyi

in 1964 after only a preliminary survey of the

assemblages was completed.

The taxonomy

of the

5.

soxoerbyi

Hammatocera-

tidae was fruitfidly (Hscussed with E. Elmi, Universitd' de Lyon,
and B. Cieczy, Museinn Koiiit, Budapest.
Mrs. Gay Walker redrew the text-figines and Miss V. Elkington
made the prints from films taken by the author.

STRATIGRAPHY
UPPER BOUNDARY AND CORRELATION OF THE
KIALAGVIK FORMATION

The

difficulties of coirelation

and definition

of formational

contacts caused by strong lateral facies changes are enhanced by

.

Alaskan ammonites,

the development ol
fossils

In
fig.

tlie first

II:

W^estermann

hiati

jxiiiuoiilonnities witli

part of this
,

I

as

indicated

i)y

which are difficult to detect.
monograph (Westermann 1964a, text-

and by bedding plane

4 opp. p. 338)

Pt.

taults

adopted the lithostratigraphic correlation

and formational boundaries of Shell Oil Company as communicated
by M. V. Kirk, although the alternate position of the formational
contact Kialagvik-Shelikof as placed by the U.S. Geological Sur-

vey had also been indicated. Without direct knowledge of the

exposures

I

tensive field

chose to reproduce the results based on the more ex-

work which

Geological Sinvey

— was

— as

admitted by R.

W. Imlay

of the U.S.

Company.

that carried out by Shell Oil

This correlation resulted in a remarkable alleged heterochroneity
of the formational contact transgressing along the

NW side of Wide

Bay through a lateral distance of only 10 km from tlie top of the
E. Iiozoelli Zone (Moose Creek — Mt. Kathleen section) to the top
of the O. saiizei Zone (Mt. Mamie section) and back to the E.
hoxoclli Zone (Short Creek section) involving a stratigraphic interval of 200-300 m. Along the southeastern side of the bay, the
contact was placed within the intermediate

my

5.

sowerbyi Zone.

Wide Bay in
and correlation
of the formational boiuidary as originally implied by Capps
(1922) and as amended and defined by Kellum, Daviess, and
Swinney in 1944 (1945) previous to the more recent mapping
Based on

simimer,

1964,

I

subsequent brief

now adhere

to

field

work

at

definition

the

,

by Shell Oil Company (luipublished)
The base of the Shelikof Formation was originally
1922)

placed at the regional iniconformity

formity)

(locally

a

(Capps,

paracon-

developed throughout the "Cold Bay" [Puale Bay] area

including "Kialagvik Bay"

[Wide Bay],

of the

terrigenous and

tuffaceous beds bearing the Callovian guide fossil Cadoceras.
lies directly on the Lower
Middle Jurassic sequence (Aalenian and lower
Bajocian) is present at Wide Bay, which Capps (1922) named the
Kialagvik Formation. However, Capps had only visited the northwest side of tlie bay where the Bajocian (s.s.) is reduced, and he
probably did not see the actual contact which is usually concealed,
nor was he able to compile a complete stratigraphic section from
the isolated exposures {op. cit., p. 95) The upper expanse of the

While

Jurassic,

a

at

Puale Bay the Shelikof

thick

.


10

Bulletin 255

Kialagvik Formation becomes evident from the described exposures of "sandstones, sandy shale and conglomerate." Besides

the E. hoiL'clU Zone of the bluffs, Capps' KialagN ik Formation also
included the O. sauzel Zone of location No. 1-113 (10809), about
km upstream Caribou Creek at the west end of the bay. Previously T. \V. Stanton (in Capps, 1922, p. 96) noted that the
1

Souniuia and Inoceramus from this locality are "identical with
forms in No. 33 of Martin's Tuxedni Bay section" (Martin and
Katz,

1912,

p.

61:

lot

No. 33 with "StepJiauoceras, Harpoceras,

[O. sauzei Zone] and are younger than the E. hoicelli

etc.")

semblage. This location
of Kellum, et

al.

(1945,

is

fig.

placed in the "Inoceramus

as-

probably identical with location F 20
"Section near Camp 3" which was
2)
:

sp. C.

et al. (loc. cit.) the sandstone

Subzone." According to Kellum,

bearing this assemblage [O. sauzei

Zone] is separated from the "Hatnrnatoceras Zone" [E. howelli
Zone] beneath by an unconformity and about 125 m of poorly
exposed beds including, above, grey-green silty sandstones with

abundant plant fragments. The "Moose Creek

Company

tion" of Shell Oil

No. 1-113
Formation, 100-120

-

Mt. Kathleen

includes Capp's original

sec-

Kialagvik

which,

location

m

however, is placed in the Shelikof
above the formational contact at the top of

the E. howelli Zone.
et al. (1945), who carried out a summer's field work
and produced the geological map of Wide Bay, logically
continued Capps' preliminary work and successfully attempted
to compile and correlate the three sections of Caribou, Anderson,
and Short Creeks. Their placing and correlation of the formational
contact appears essentially correct and in agreement with the original definition. In the Anderson Creek section ("Creek near Camp

Kellum,

in 1944

No. 2
j)any)

'

,

of Kellum, et ah, "Mt.

Mamie

section" of Shell Oil

Oil (>ompany,
Shell Oil

i.e.

al.

above the sandstones of
at top of "Seymourites subzone"?)

Company

Com-

and Shell
the O. sauzei Zone (by

the contact was placed similarly by Kelhmi, et

.

The

al-

leged correlation of the E. JioivelU Zone sandstones of Caribou

Creek with the O. sauzei Zone sandstones of Anderson Creek as
proposed by Shell Oil (Company, appears to be due to the stratigraphic approximation of the respective arenite series in the latter
section; the intermittent argillaceous sequence has become thinner,


,

.

Alaskan ammonites,

Pt. II:

Westermann

more arenaceous and carbonaceous (Kellum,
Shell location No.

A

now dated

as

and

is

601

et

m

lower in

1945,

al.

fig.

2).

(WA

has been re-examined

(F43)

14)

O. sauzci Zone, based on the presence of

Parabigotites crassicostatus Imlay. Shell location No.
10-12

II

section,

tlie

A

600 (F 42)

poorly fossiliferous, but a single

is

}Docidoceras (Pseudocidoceras), based on preliminary identification
in 1964,

would suggest up

to 50-60

m

possible

5.

Zone

soioerbyi

in arenaceous-argillaceous and, below, carbonaceous fades.

km northeast of Anderson Creek,
predominantly arenaceous and conglomoverlaid by 30-40 m barren grey shales,

In the Short Creek section, 5

only the E. hoivelli Zone
eratic.

This sequence

is

is

well exposed at the steep right

bank near the mouth of

a tributary.

m

of silty shale with several thick beds

of conglomeratic sandstone

and lenticular limestone, the lower

Above follow about 150
50

m

of

Zone [L
cett)

,

L

which have now

definitely

1062: Stemjnatoceras

cf.

S.

been placed in the O.
triptolemus

1038: 'Witchellia' adnata Imlay,

Inoceramus

liicifer

WA16:

Eichwald ranges almost

sequence (F4, F24, F25,

WMla)

saiizei

(Morris and Ly-

Parabigotites sp.];

to

the

top of

this

which, therefore, probably belongs

Zone (cf. Imlay, 1955, p. 86) This sequence is conformably overlaid by dark grey shales with diabase
sills which have yielded Callovian ammonites at 140-150 m above
base [A463, F5] and are probably entirely of Callovian age. The
entirely in the O. sauzei

Kialagvik-Shelikof contact
shale

and sandstone

Kellum,

The

et al.

30-40

.

is,

series

therefore,

at

the

top of the

silty

of the O. sauzei Zone, as placed by

(1945)

m

barren shales of the Short Creek section separat-

ing the arenite sequences of E. hoxoeUi and O. sauzei Zones

may

be-

These shales can tentatively be correlated with the poorly exposed argillaceous sequences near the
bases of the Caribou Creek and Anderson Creek sections and, perhaps, with the Pseudocidoceras zonule (? and all or part of the

overlying unfossiliferous interbedded shales and sandstones) of the
long in the

S.

soiverbyi Zone.

southeastern side of the bay.

Along the southeastern shore
Creek, the bluffs and

m

of

Wide

Bay, east of Preston

expose from the base

(1)

10-20

m

mudstone with some greywacke beds, (2) about
interbedded silty shale and greywacke grading upwards

imfossiliferous

22

cliffs


Bulletin 255

12

subgreywackc

in massive fossiliferous

sowerbyi Zone]:

50-()()

(3)

m

(?

[E. (iniplcc tens

100 m)

to

zonule of

mostly highly

S.

fossili-

ferous shales with concretions [Pseiidocidoccras zonule of S.
sowerbyi Zone] grading upwards into {A) 80-100
unfossiliferons
interbedded sandy slialcs and sandstones which are topped by (5)

m

subgreywackes with intermittent

fossiliferous

The

silty

shale [Parabigo-

Zone emerges immediately west of Preston Creek but crops out below sea level
eastward. Tlie small cape just west of the mouth of Preston Creek
which forms tlie base of a high bluff (Shell loc. L 154) belongs

titcs

zonule of O.

to tlie T. ten
tiie

lie

E.

Jioxi'clli

zonide, formerly T. tenue-jlexicostatnm zonule of

highest E. hoxvelU Zone, lower horizons of which are exposed

in the shore

cliff at

L 556) However,
my locations ^V^A
.

5.

Zone].

saiizei

the western

Shell location

end of the Bay

L

1

(Shell Iocs.

L

555,

54 in the E. howelli Zone and

WA

3 and
4 which yielded the lowest probable
sowerbyi Zone faunules are stratigraphically separated by about

80-100

m

unfossiliferons terrigenous sediments, so that the position

of the zonal boiuidary

At

unknown.

is

most of the bluff west of Preston Creek is roughly
ecjuivalent to the bhdfs along the northwestern shore of Wide
Bay, including the base of the Caribou Creek section, while the
bluff of the E. amplecten.s zonide east of Preston Creek seems unleast

represented at the other side of the Ijay.The Pseiidocidoceras zonule

may

be c(|ui\alent

to

the

30-70

m

argillaceous

beds overlying

the E. Iioxvelli sandstones at the northwestern side of the bay.

The

Parabigotites zonule and prol)aljly also at least part of the underlying interljedded sandstone-shale sequence belong to the "Dnctylio-

ceras-Inocerarnus sp. C. Zone" [O. saiizei Zone] of Kellum, et

al.

which they believed to be the most persistent zone in the
Wide Bay area. This forms tlie upper thick arenaceous complex of
(1945)

the Kialagvik Formation.

map

However, Kellum, et nl. (1915, p. 7; diagrammatic section on
B) wrongly correlated the southeastern shore exposures with

known sequence

the better

of the other side of

.

.

.

miles from the

.

Wide

Bay.

The

end of the peninsula
continuing ... in the

from
all the way to the end of the bay and
mountain front beyond to the head of the
"sea cliffs

3i/^

.

.

.

.

.

valley",

believed to

represent the "DactyUcoeras-Inocerarniis sp. C. Zone", belong in


Alaskan ammonitks,

Pt.

II:

Westermam

13

S. soxverbyi Zone and in the southwest
upper E. JiowcUi Zone. In their diagrammatic section, the
Kialagvik-Shelikof contact was drawn at the top of the Pseudocidoceros zonule but on their geologic map at the top of the E.

the northeast to the lower
to the

aniplectens zonule and, soutliwest of Preston Creek, probably near

the top of the E. howclU Zone.

LOCALITY SYMBOLS


14

Bulletin 255

s


.

Alaskan ammonites,

NW

side

Westermann

Pt. II:

SE

WIDE BAY

of

side

(composite)

(Short Creek)

(Anderson Creek)

15

:)
300 M
TizJ

//

/
Pseudocidoceras

(i°}7 /

zle/

^'Z-T .

_—

Vl.1038

.

/

/ SOWERBYI

^'V
'

/--T^^

/

/
VLI062

amplectens zleS

ZONE
/

UPPER
HOWELLl ZONE

fe^^*'^}^

—

Text-fig. 4.
Tentative correlations of the upper Kialagvik Formation
between the Anderson Creek and Short Creek sections at the northwest side

(part. Keilum, et al., 1945) and the SE. side (composite) of Wide Bay. The
important fossil localities, formational contacts, ammonite zones and zonules

are indicated.

BIOSTRATIGRAPHY OF THE KIALAGVIK FORMATION
ERYCITOIDES HOVVELLI ZONE

The

results of

are consistent with

my
the

brief field

work

in

1964

(Text-figs.

2-9)

faunal sequences as reported from

Kialagvik Formation along the northwestern side of

Wide Bay

the
in

monograph (Westermann, 1964a, p. 339 ff.)
The thicknesses of the faunal zonules and their intervals are confirmed for the Short Creek and Caribou Creek sections except for
the E. howelli zonule which now appears somewhat thicker. Howthe

first

part of this


Bllletin 255

16

CO
-I

O
i

E
t,

^

^

>

to

en

Ui.

o-

>.

-~

>0"!'ivD

CO

J

Nvioorva


U.S.

Phylloceras (Zetoceras)

sp.

n

IMLAY

Holcophylloceras costisparsum
Lytoceras

1+

eudcsianum (ORB.)

aii. L.

Hcbctoxyiics

(ORB.)

P. zetcs

cf.

Partschiceras ellipiicum

Geology Survey

BUCK

H. hebcs

aff.

Bradfordia? (Praeoppclia) oppeliiformis subgen.

et sp.

n

Pscudolioccras madintocki fastlgatum subsp. n
Pseudolioccras cost'utriatum

Asthcnoceras

n

sp.

A. nannodes (BUCK.)

aff.

cuJmctum BUCK
E. (Euaptetoceras) klimakomphalum discoidale

Eudmctoccras

aff. E.

(s.s.)

E. (Euaptetoceras) aff. E. nuctcospinosum
E. (Euaptetoceras) amplectens

(BUCK)

Eudmetoccras s.l.indct. [(J]
Planammatoceras (Pscudammatoccrasf)

subsp. n

WEST

[? Var./subsp. aguilonia

(1)

IMLAY]

Cf.

Sonninia (Euhoploceras) bijurcata
Sonninia (Euhoploceras

sp.

benneri

aff. P.

(HOFFM.)

n

sp. indet

?)

Sonninia (Alaskoceras) alaskensis subgen.

n

et sp.

IVitchellia sutncroides sp. n

Pclckodites

Docidoceras

D,
D.
D.
D,
D,
D.
D.
D.

cf.

(s.s.)
(s.s.)

P. pclckus

aff.

BUCK

D. longalvum

(VACEK)

(Pseudocidoceras)
et sp.

5+

n

(1)

D. viidebaycnsc
(Pseudocidoceras'? ) aii. D. 'widebayensc
(Pseudocidoceras) camachoi subgen. et sp. n
(Pseudocidoceras)

cf.

(Pseudocidoceras) sp.n.

A

?l7Pscudocidoceras/suhgei\. nov.] sp.n.
?

B

(Pseudocidoceras?) paucinodosum subgen.

(Trilobiticcras?)

Pseudotoites

cf.

Pseudotoites

cf. P.

sp.n.

et sp.

n

indet

P. argentinus

ARKELL

transatlanticus

(TORNQ.)

—

Text-fig. 6.
Occurrences of ammonite species from the 5. soiverbyi Zone
of Wide Bay; numbers of identified specimens indicated. Localities of the
U.S. Geological Survey (U.S.G.S.), California Academy of Sciences (C.A.S.),
Shell Oil Company (Shell), University of Washington (U.W.), and of the
author.



Alaskan ammonites,

Pt.

Westermann

II:

17

FORM

KIALAGVIK
5
"

!l

ill

\

i

\
\

m

w
o

4

—

>

o

-

>

J>

+

cf

phyllocerasiZeioceras)

P«'es (ORB)

Partschiceras elhpticum sp n
--.

Hoicophylioceros costisparsum

---

Lytoceros

off-

IMLAY

L eudesionum (ORB)

Pseudolioceras mchntocki fosiigotum subs

^.
-

I

costistriotum sp n

P

Asthenoceras

^

£

-

(

A nannodes (BUCK

aff.

Eudmetoceras

Euopletoceras

)

klimokomphalum

dis

jidale subsp n

omp/ecfens {BUCK )[var/7 subsp osui/omo IML.]

(£)

Sonninia (Euhoploceras) bilurcato sp

(-? subsp)

)

E eudmefum BUCK.

aff.

n

sp ndel,

S

(E?)

S.

lAlaskoceros) alostfensis sp

n.

Witcheliia sutneroides sp n

^

--

Pelekodilesct Ppe/ekus BUCK.

R

(SpoluMes

Docidoceras

?) sp nov

off.

P

spolions BUCK.

D longolvum (VACEK)

off

(Pseudocidoceras)

wideboyense sp

t*(defcoyense

(P)

cf

(P)

camachoi sp

(P)(') sp

n

novB

(R)-'

+

Pseudoloites cf

p

P

P orjen/mus ARKELL

/ronsol/ondcus

(TORN

)

Bradfordio 7 iProeoppelia) oppeliiformis

.-

—

cf.

Hebetotyites off

K hebei

BUCK.

Composite section of the S. soiverbyi Zone and
Text-fig. 7.
distribution at the SE. side of Wide Bay. Stratigraphic range of
(sections) and relative abundances of species indicated.

ammonite
localities