Report on Referred Fossils |
|
|
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.
|
|
User Note module to be added |
|
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
|
|
|
|
|
|
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.
|
|
|
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.
|
|
|
|
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
|
|
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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
|
|
|
|
|
|
|