Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Upper Triassic
Kinds of fossils: Ostracodes
Quadrangle or area: Mt. Michelson
Shipment No.: A-70-6
Referred by: Detterman, Robert L.
Report prepared by: Sohn, I. G.
Date: 12/03/1973

Harlan Bergquist gave me 37 slides with ostracodes he found in studying the foraminifera from the measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. I am particularly happy to have these ostacodes because I had previous collection from the upper part of the Shublik Formation on Dodo Creek (Sohn, 1965, Significance of the Triassic ostracodes from Alaska and Nevada: USGS Prof. Paper 501-D, p. D40-D42). In that paper had listed the following forms: HUNGARELLA sp. or spp., PARACYPRIS? sp., and DARWINULA? sp. and steinkerns undet. The collections from Fire Creek contain HUNGARELLA sp. or spp., BAIRDIA sp. (one carapace), and steinkerns of undetermined genera. These collections are important because of the presence of single valves of HUNGARELLA that show the hinge structure, and of some steinkerns of the same genus that show the muscle-scar pattern. Both of these features may help unravel the OGMOCONCHA-HUNGARELLA problem, a recent discussion of which is in Lord, 1971, The ostracod genera OGMOCONCHA and PROCYTHERIDEA in the Lower Jurassic: Geol. Soc. Denmark, Bull. 21, p. 319-336). I would like to prepare a note on this subject, and will appreciate more geologic and geographic data than give above. Do you have any additional material of the collections? The ostracodes on the slides are few, mostly poorly preserved, and probably do not represent the entire ostracode assemblage in these rocks.

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Slide no. 3-7, 105-110 feet above base of Shublik Formation , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-7, 105-110 feet above base of Shublik Formation.
1 broken carapace, length 0.6 mm, of smooth unidentifiable ostracode
2 slightly larger valves filled with matrix of smooth ostracodes belonging to a different genus, also unidentifiable
3 small unidentfiable fragments
Slide no. 3-8, 110-115 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-8, 110-115 feet above base of Shublik Formation.
fragment of a healdiid shaped ostracode, less than 0.5 mm in length.
Slide no. 3-10, 120-125 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-10, 120-125 feet above base of Shublik Formation.
Fragment of a steinkern, possibly same as carapace in slide 3-7
broken valve of a smooth ostracode, differs in shape from previous forms
Slide 3-16, 150-155 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-16, 150-155 feet above base of Shublik Formation.
2 steinkerns similar to slide 3-8
one undet. fragment
Slide 3-17, 150-155 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-17, 155-160 feet above base of Shublik Formation.
One carapace
fragment of a valve, of probably the same species as above
Slide 3-18, 160-165 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-18, 160-165 feet above base of Shublik Formation.
1 broken steinkern of elongate, subcentrally sulcate ostracode
one valve of a smooth ostracode
Slide 3-21, 175-180 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-21, 175-180 feet above base of Shublik Formation.
Steinkern undet.
Slide 3--25, 195-200 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 3-25, 195-200 feet above base of Shublik Formation.
One half of a valve filled with matrix 0.5 mm long
smooth large form
Slide 4-1, 215-220 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 4-1, 215-220 feet above base of Shublik Formation.
1 carapace of Hungarella? sp. 1, greatest length 0.6 mm
1 broken valve and 2 steinkerns of smaller, possibly conspecific ostracodes
Slide 4-2, 220-225 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 4-2, 220-225 feet above base of Shublik Formation.
1 steinkern possibly same as above
Slide 5-9, 272-277 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 5-9, 272-277 feet above base of Shublik Formation.
Steinkern, small, undet.
Slide 6-1, 325-330 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-1, 325-330 feet above base of Shublik Formation.
Hungarella sp., abundant
Slide 6-6, 350-355 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-6, 350-355 feet above base of Shublik Formation.
Hungarella sp., abundant
Slide 6-7, 355-360 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-7, 355-360 feet above base of Shublik Formation.
Hungarella sp., abundant
Slide 6-8, 360-365 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-8, 360-365 feet above base of Shublik Formation.
Hungarella sp., 1 valve, 3 young
Slide 6-9, 365-370 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-9, 365-370 feet above base of Shublik Formation.
Hungarella sp., abundant
Gen. indet., small, elongate, smooth. Rare
Slide 6-10, 370-375 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-10, 370-375 feet above base of Shublik Formation.
Bairdia sp., 1 carapace
Hungarella sp., abundant
Slide 6-11, 375-380 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-11, 375-380 feet above base of Shublik Formation.
Hungarella sp., abundant
Slide 6-12, 380-385 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-12, 380-385 feet above base of Shublik Formation.
Hungarella sp., 5 carapaces, 1 valve
Slide 6-13, 385-390 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-13, 385-390 feet above base of Shublik Formation.
Hungarella sp., 5 carapaces
Slide 6-14, 390-395 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-14, 390-395 feet above base of Shublik Formation.
Hungarella sp., 8 carapaces
Gen. indet., elongated, smooth, 0.55 mm long, corroded
Gen. indet., part of valve
Slide 6-15, 395-400 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-15, 395-400 feet above base of Shublik Formation.
Hungarella sp., 4 carapaces, 1 valve
Slide 6-16, 400-405 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-16, 400-405 feet above base of Shublik Formation.
Hungarella sp., 1 adult, 7 young
Slide 6-17, 405-410 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-17, 405-410 feet above base of Shublik Formation.
Hungarella sp., 5 carapaces
Gen. indet., small elongate, 1 carapace
Slide 6-18, 410-415 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-18, 410-415 feet above base of Shublik Formation.
Hungarella sp., abundant carapaces, 1 valve showing hinge
Slide 6-19, 415-420 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-19, 415-420 feet above base of Shublik Formation.
Hungarella sp., 7 carapaces, one valve
Slide 6-20, 420-425 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-20, 420-425 feet above base of Shublik Formation.
Hungarella sp., 8 carapaces, 1 valve
Slide 6-21, 425-430 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-21, 425-430 feet above base of Shublik Formation.
Hungarella sp., 8 carapaces, 1 valve, 4 steinkerns
Hungarella? sp., more elongate, 0.62 mm long
Slide 6-22, 430-435 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-22, 430-435 feet above base of Shublik Formation.
One broken specimen destroyed in handling
Slide 6-23, 435-440 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-23, 435-440 feet above base of Shublik Formation.
Hungarella sp., 3 carapaces, one steinkern, one broken valve
Slide 6-24, 440-445 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-24, 440-445 feet above base of Shublik Formation.
Hungarella? sp., 1 valve
Slide 6-26, 450-455 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-26, 450-455 feet above base of Shublik Formation.
Hungarella sp., 3 carapaces
Slide 6-27, 455-460 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-27, 455-460 feet above base of Shublik Formation.
Hungarella sp., 3 carapaces, 1 fragment
Gen. indet., 1 small carapace, 0.4 mm long, smooth
Slide 6-28, 460-465 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-28, 460-465 feet above base of Shublik Formation.
Hungarella sp., 3 carapaces
Gen. indet., 1 carapace same, but slightly longer than above.
Slide 6-29, 465-470 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-29, 465-470 feet above base of Shublik Formation.
Hungarella sp., 2 carapaces
Slide 6-30, 470-475 feet above base , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-30, 470-475 feet above base of Shublik Formation.
Hungarella sp., 7 carapaces
Slide 6-31, 475-477 feet above base , Mt Michelson , Measured section of the Shublik Formation on Fire Creek, NE Alaska, 69 deg. 32 min. N., 145 deg. 12 min. W., Mt. Michelson quadrangle. Slide 6-29, 475-477 feet above base of Shublik Formation.
Hungarella sp., 1 carapace