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Report on Referred Fossils
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Stratigraphic range: Jurassic (Lower & middle Bajocian)
Kinds of fossils: Mollusks
Quadrangle or area: Ugashik B-2
Shipment No.: A-81-11
Referred by: Detterman, Robert L.
Report prepared by: Imlay, Ralph W.
Date: 02/12/1981

KIALAGVIK FORMATION

At Wide Bay on the Alaska Peninsula the lowest exposed beds of the Kialagvik Formation contain Tmetoceras scissum (Zone 1) but no other ammonites. The overly beds have furnished an abunance of ammonite including Tmetoceras, Pseudolioceras, Planammatoceras, Eudmetoceras (Euaptetoceras), Erycites, E (Kialagvikes), and Abbasites (Zone 2). Directly above follow beds that are characterized by Docidoceras (Pseudocidoceras) widebayense (Zone 3) in association with Witchellia, Sonninia (Euhoploceras) and Sonninia (Alaskoceras). Still higher the upper 200 feet (61 m) of the Kialagvik Formation have furnished many specimens of Parabigotites crassicostatus Imlay associated with, or directly underlying Sonnina, Eudmetoceras, Bradfordia, Otoites, Stephenoceras, Stephenoceras, Stemmatoceras and Arkelloceras (Imlay, 1964, Prof. Paper 418-B, p. B18, B54). The presence of these ammonites shows that Zone 1 correlates with the European Ludwigia murchisonae Zone, Zone 2 with the Graphoceras concavum Zone, Zone 3 with most of the Sonninia sowerbyi Zone, and Zone 4 with the lower part of the Otoites sauzei Zone.

The only pelecypod of known age significance is Inoceras lucifer Eichwald which ranges throughout the Kialagvik Formation on the Alaska Peninsula. Elsewhere in southern Alaska it does extend a little higher but terminates just below the lowest occurrence of Chondroceras and Teloceras (Imlay, Prof. Paper 801, p. 11).

AMMONITE ZONES IN WIDE BAY AREA ARRANGED FROM HIGHEST TO LOWER

Zone 4. Parabigotites crassicostatus at localities 80ACe177A, 199B, TPp5. Associated with Bradfordia and Abbasites and directly underlying beds containing Sonninia, Eudmetoceras, Otoites, Stephenoceras, Stemmatoceras.

Zone 3. Docidoceras (Pseudocidoceras) widebayense at localities 80ACe138c, 174, 174A, 174B, 175A, 175B & 177C. Other characteristic zone fossils include D. (P.) paucinodosum, D. (P.) widebayense, D. (P.) cf. D. (P.) camachoi and Euhoploceras bifurcata, Witchellia and Alaskoceras.

Zone 2. Erycitoides howelli at localities 80ACe139, 161, 162, 163, 163A, 163B, 164, 175 to 176 (float), 199C, 200, 200A, 201, 202, 202 and 202A, 203, TPp 1(?), TPp 2. Other characteristic zone fossils includes Pseudolioceras whiteavesi, Abbasites, Planammatoceras, Eudmetoceras (Euaptetoceras), Erycitoides and E. (Kialagvikes).

Zone 1. Tmetoceras scissum. This genus underlies and ranges up into the zone of Erycitoides howelli.

LOCALITY OCCURRENCES OF AMMONITES IN THE KIALAGVIK FORMATION

Phylloceras cf. P. kunthi Neumayr - 80ACe177A, 80ACe177C
Holcophylloceras - 80ACe177A, B and E, 80ACe199A
Partschiceras? - 80ACe177D
Tmetoceras scissum (Benecke) - 80ACe163 float, 80ACe200.
Pseudolioceras whiteavesi (White) - 80ACe161 (float), 80ACe163B, 80ACe 175A, 80ACe200, 80ACe201
Abbasites platystomus Westermann - 80ACe175 to 176 (float), 80ACe177A, 80ACe199C (in place)
Abbasites? sp. - 80ACe139
Planammatoceras? aff. P. benneri (Hoffman)? - 80ACe177C
Eudmetoceras (Euaptetoceras klimakomphalus discoidale Westermann - 80ACe163B, 80ACe174A, 80ACe175A
Eudmetoceras (Euaptetoceras) sp. - 80ACe174, 80ACe163 (float)
Eudmetoceras? sp. - 80ACe175A
Erycitoides howelli (White) - 80ACe200A, 80ACe200, 80ACe166, 80ACe162, 80ACe162 (float), 80ACe163A & 163B, 80ACe202 & 202A (float), 80ACe164.
Erycitoides cf. E. howelli (White) - 80ACe161 (in place), TPp 2, 80ACe163 (in place)
Erycitoides sp. - 80ACe163 (float), 80ACe200A
Erycitoides? sp. - TP; 1, 80ACe163A (Fault slice)
Erycitoides profundus Westermann - 80ACe161 (in place)
Erycitoides cf. E. profundus Westermann - 80ACe203
Erycitoides teres Westermann - 80ACe161 (float)
Erycitoides cf. E. teres Westermann - 80ACe163 (float)
Erycitoides (Kialagvikes) kialagvikensis Westermann - 80ACe161 (float), 80ACe162 (float), 80ACe163 (in place), 80ACe163 (float), 80ACe200A
Erycitoides (Kialagvikes) spinatus Westermann - 80ACe164
Erycitoides (Kialagvikes) sp. - 80ACe163B
Docidoceras? (Pseudocidoceras?) pacuinodosum Westermann - 80ACe174
Docidoceras (Pseudocidoceras) widebayense Westermann - 80ACe174A
Docidoceras (Pseudocidoceras) cf. D. (P.) camachoi Westermann - 80ACe138C
Docidoceras (Pseudocidoceras sp. - 80ACe175A (in place)
Docidoceras (Pseudocidoceras) sp. - 80ACe175A (in place)
Docidoceras? sp. juv. - 80ACe174A
cf. Docidoceras (Pseudocidoceras) - 80ACe174B
Euhoploceras bifurcata Westermann - 80ACe175B
Euhoploceras? sp. - 80ACe175B (float)
Parabigotites crassicostatus Imlay - 80ACe199B, 80ACe177A, 80TPp 5

User Note module to be added
80ACe136 , Ugashik , Sec. 34, T.33S., R.45W., lat. 57 deg. 17 min. 24 sec. N., long. 156 deg. 29 min. 30 sec. W., 3.17 mi. S.05 deg. E. of Tri. Sta. Spit, muddy ss.
Inoceramus lucifer Eichwald
Pleuromya dalli (White)
Trigonia sp.
80ACe137 , Ugashik , Sec. 26, T.33S., R.45W., lat. 57 deg. 17 min. 56 sec. N., long. 156 deg. 28 min. 25 sec. W., 2.73 mi. S.21 deg. E. of Tri. Sta. Spit, pebble congl. float
Inoceramus sp.
80ACe138 , Ugashik , Sec. 25, T.33S., R. 45W., lat. 57 deg. 18 min. 21 sec. N., long. 156 deg. 26 min. 21 sec. W., 3.05 mi. S.48 deg. E. of Tri. Sta. Spit, muddy ss and siltstone.
Inoceramus lucifer Eichwald
Pleuromya dalli (White)
Meleagrinella sp.
80ACe138A , Ugashik , Sec. 25, T33S, R45W, lat. 57 deg. 18 min. 27 sec. N., long. 1565 deg. 26 min. 15 sec. W., 3.06 mi. S.49 deg. E. of Tri. Sta. Spit, congl.
80ACe138B , Ugashik , Sec. 25, T33S, R45W., lat. 57 deg. 18 min. 31 sec. N., long. 156 deg. 26 min. 06 sec. W., 3.1 mi. S.51deg. E. of Tri. Sta. Spit, brittle mudstone.
Pleuromya sp.
Gastropod undet.
80ACe138C , Ugashik , Sec. 25, T33S, R45W., lat. 57 deg. 18 min. 31 sec. N., long. 156 deg. 25 min. 54 sec. W., 3.18 mi. S.52 deg. E of Tri. Sta. Spit, silty mudstone and sandstone.
Docidoceras (Pseudocidoceras) cf. D. (P.) camachoi Westermann
Inoceramus lucifer Eichwald
Pleuromya dalli (White)
80ACe139 , Ugashik , Sec. 30, T33S, R44W, lat. 57 deg. 18 min. 28 sec. N., long. 156 deg. 25 min. 53 sec. W., 3.28 mi. S.54 deg. E. of Tri. Sta. Spit, sandstone.
Abbasites?
Eudmetoceras?
Inoceramus lucifer Eichwald
Belemnites undet.
80ACe161 (float) , Ugashik , Sec. 17, T33S, R45W. Lat. 57 deg. 19 min. 31 sec. N., Long. 156 deg. 32 min. 20 sec. W., 1.6 mi. S.65 deg. W. of Tri. Sta. Spit, pebbly sandstone.
Erycitoides teres Westermann
Erycitoides (Kialagvikes) kialagvikensis (White)
Pseudolioceras whiteavesi (White)
Trigonia spp.
80ACe161 (in place) , Ugashik , Same locality as above.
Erycitoides cf. E. howelli (White)
Erycitoides profundus Westermann
Trigonia sp.
Scaphotrigonia sp.
Pleuromya dalli (White)
80ACe162 (in place) , Ugashik , Sec. 16, T33S, R45W, lat. 57 deg. 19 min. 44 sec. N, long. 156 deg. 32 min. 10 sec. W, 1.4 mi. S.71 deg. W of Tri. Sta. Split, pebbly sandstone.
Pleuromya sp.
Camptonected
Erycitoides (Kialagvikes) sp.
80ACe162 (float) , Ugashik , same locality as 162 above.
Tmetoceras scissum (Benecke)
Erycitoides (Kialagvikes) kialagvikensis (White)
Erycitoides howelli (White)
Pseudolioceras whiteavesi (White)
Trigonia sp.
Vaugonia sp.
80ACe163 (float in one piece) , Ugashik , Sec. 16, T33S, R45W, lat. 57 deg. 19 min. 48 sec. N, long. 156 deg. 32 min. 00 sec. W, 1.3 mi. S.
Erycitoides howelli (White)
Erycitoides sp.
Vaugonia sp.
Camptonectes? sp.
80ACe163 (in place) , Ugashik , same locality as above.
Erycitoides cf. E. howelli (White)
Erycitoides (Kialagvikes) kialagvikensis (White)
Phylloceras sp.
Belemnites
80ACe163 (float not in one piece) , Ugashik , same locality as above.
Eudmetoceras (Euaptetoceras) sp.
Erycitoides cf. E. teres Westermann
Erycitoides (Kialagvikes) kialagvikensis (White)
Trigonia sp.
Float between locs. 80ACe163A and 163B , Ugashik , Float between locs. ACe163A and 163B
Erycitoides howelli (White)
80ACe163A (from fault slice) , Ugashik , same lcoality as above. Gray ss.
Erycitoides? sp.
90ACe163B (in place) , Ugashik , Sec. 16, T33S, R45W, lat. 57 deg. 19 min. 53 sec. N, long. 156 deg. 32 min. 11 sec. W, 1.4 mi. S. 77 deg. W of Tri. Sta. Spit. Brownish mudstone.
Pseudolioceras whiteavesi (White)
Eudmetoceras (Euaptetoceras) klimakomphalum discoidale Westermann
Erycitoides (Kialagvikes) sp.
Pleuromya dalli (White)
Camptonectes sp.
80ACe164 , Ugashik , Sec. 16, T33S, R45W, lat. 57 deg. 19 min. 50 sec. N, long. 156 deg. 31 min. 42 sec. W., 1.12 mi. S. 73 deg. W. of Tri. Stat. Spit, massive sandstone float block.
Erycitoides howelli (White)
Erycitoides (Kialagvikes) spinatus Westermann
Inoceramus lucifer Eichwald
Pleuromya dalli (White)
Camptonectes sp.