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Geologic Studies in the Southern Prince Charles Mountains (3 0 Ms

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Geologic Studies in the Southern Prince Charles Mountains (3 0 Ms A preliminary palynological assay in collabora- Tasch, P. 1976. Jurassic nonmarine spoor (Transantarctic tion with J . M. Lammons (Trinidad Texaco) of Mountains) and the food web. Journal of Paleontology, 50(4): slides from my Transantarctic Mountains fossil 754-758. Tasch, P., M. V. A. Sastry, S. C. Shah, B. R. J . Rao, C. N. Rao, collection indicated those from Storm Peak (Upper and S. C. Ghosh. 1975. Estheriids of the Indian Gondwanas: Flow) had a small residue after acid digestion with significance for continental fit. In: Gondwana Geology (Camp- a few spores and pollen and sparse floral frag- bell, K. S. W., editor). Australian National University Press, ments; those from Blizzard Heights (Tasch Station Canberra, 443-452. 0) also had a small residue, but more spores and floral fragments than those from Storm Peak; Cara - pace Nunatak (Tasch Station 2) (Tasch, 1974) by contrast contained dense plant and wood frag- ments and numerous better preserved spores and Geologic studies in the southern pollens. Further palynological studies are planned. Prince Charles Mountains These data also point to more complexity in the food chain: in this instance, in terms of additional food resources. They also suggest denser wooded EDWARD S. GREW areas in southern Victoria Land some 850 kilo- Department of Geology meters from the Queen Alexandra Range. University of Cal[ornia, Los Angeles The arthropods of the Tasmanian Triassic Los Angeles, California 90024 (Knocklofty Formation chiefly and Ross sandstone) (Tasch, 1975) include fossil conchostracan genera Geologic studies in the southern Prince Charles as follows: Paleolimnadia (two subgenera and six Mountains, including detailed work at five localities species); Cyzicus (Lioestheria) (three species) and (figures 1 and 2), were made while I was U.S. ex- Paleolimnadopsis tasmanii n.sp., as well as a frag- change scientist with the 18th and 19th Soviet Ant- mental malacostracan carapace. The Paleolimnadial arctic Expeditions (SAE) in 1973 and 1974 (Grew, Cyzicus faunal assemblage indicates probable corre- 1975). lation with the Blina shale (Western Australia) and the Mangli beds (India). Eastern Australia could 62E 68 have been the source area for the Tasmanian paleo- limnadids. bgO Field work in collaboration with the Geological G A 4I ° Survey of India (Tasch et al., 1975) systematically bg$ GJ\o 4? , c sampled the conchostracan-bearing beds of the In- 73 rns (3 s/SO c MS bgms u (,.S dian Jurassic Kota Formation among others. An ms S 35 (KY-ST- ms ms SI) important biostratigraphically related collection 30] 01\31a\VA Iq (seven or more successive insect-bearing beds) was 70 .1 5 IF ms found in the Tasch collection during processing. K3 31 ic MS (B) F. M. Carpenter (Harvard Biological Laboratories) )BI st is doing the taxonomy in ajoint study that will cover the biostratigraphy and paleocology of these beds 74S ms 0 F25 as well. Dr. Carpenters first-sight survey of the collection showed that at least six insect orders and 57 AVERAGED TREND possibly more were present: Coleoptera, Blattaria, c ICE FREE AREAS Homoptera, Neuroptera, and Heteroptera. GEOLOGIC CONTACT The Kota Formations nonmarine biota have X LOCATION OF SAMPLE 544 9 100 KM several affinities with Jurassic equivalents in the Transantarctic Mountains. PRECAMBRIAN ROCKS METAMORPHIC INDEX + GRANITE AND PEGMATITE MINERALS This research was supported by National Science WITH MUSCOVITE (S) SILLIMANITE ms METASEDIMENTARY AND Foundation grant DPP 75-05831. METAVOLCANIC ROCKS (KY) KYANITE WITH CONGLOMERATE (c) (ST) STAUROLITE AND IRON FORMATION (IF) (B)) BIOTITE References BASEMENT GNEISSES Tasch, P. 1974. Food chain relationship in ancient freshwater Figure 1. Geologic sketch map of the southern Prince Charles ecosystems of Antarctica. Antarctic Journal of the U.S., IX(5): Mountains. This map is based on field work by Dr. Grew in 238. 1973 and 1974, supplemented by information in Ravich and Tasch, P. 1975. Nonmarine arthropoda of the Tasmanian Tri- Kamenev (1972), Soloviev (1972), Tingey and England (1973), assic. Royal Society of Tasmania, Papers and Proceedings, 109: Grikurov and Soloviev (1974), Tingey (1975), and Tingey (per- 97-106. sonal communication, 1975). 240 ANTARCTIC JOURNAL 65x45E bg ) 0 I 2 A2 bg Mafic intrusive rocks 0 __i—tKm 689m 10 83 Quartzite and mica schist &/0 m s Basement gneisses ICE 156 Km 85 bg k .EDWARDS - PILLAR 56 1725m -73S bg /544 u 894 rn bg 79 A 734((bq mV(A <L A Mafc intrusive rocks Figure 2. Geologic sketch 45 CO Amphibole schist with A subordinate quartzite, — maps of areas studied in -73730S C mica schist and A--msi my conglomerate cl detail in the southern MS Prince Charles Mountains. Quartzite and mica schist Field data have been ILL MS Basement gneisses plotted on aerial photo- ( graphs flown in 1973 at an altitude of 6,100 meters by the Australian Division of National Mapping. Maps have not been corrected F___ 63o E 72 for distortion in the photo- . )ms graphs. Scales, which are 14 ICE 351 approximate, coordinates, --- mgn, g)\,/ ms and altitudes are from Tin- 1513 55 geys (1975) preliminary mv 7 5 edition of the Cumpston g^7 [nmJm Massif sheet. Since the mgn m y ms Cumpston Massif sheet S 952m was compiled on an un- mv ms 74xS 4401 controlled base derived f MV rAv Granite and pegmatite from ERTS imagery, the ICE 2195m mv r coordinates in the sketch Mica schist maps are approximate and ms, / Quartzite, amphibole Amphibole schists can be used only to locate ( ks, and schist Mica schist and B egesS and the sketch maps on the OjKm12/61 rac ms micaceous quartzite Cumpston Massif sheet. 1 amphiloolite Only larger bodies of mafic K intrusive rocks and of granite and pegmatite are shown; some areas of Qua- EXPLANATION ternary deposits have been 0 Quaternary deposits ICE u,)4 Mount Ruker is the same as ms Strike and dip of compositional layering 12t5n "i Strike and dip of foliation unit "m y " on Mount Sti- " i523 in near. The symbol on Mount ma 2) "-. Vertical foliation Strike and plunge of lineation Stinear marked "544" indi- ms ii-° Fold axis cates the location of A ." Strike and dip of dike sample 544, a pegmatite T55 Mafic intrusive rocks .42x-' Strike and dip of fault, vertical fault mineral that gives a lead- ms $, Slate, phyHite, quartzite, Limit of outcrop and of Quaternary deposits 206/lead-207 age of 1035 rij and conglomerate (C) Geologic contact, dashed where conjectural ±2 million years. (Analysis Iron formation EEI Fault lu-upthrown side), dashed where conjectural by W. I. Manton, University 0 1 2 Altitude in meters 63 1O' E of Texas, Dallas.) 0 Soviet field Camp Basement rocks at Mounts Stinear and Rymill are gypsum (Mount Maguire only), and calc-silicate dominantly pink or gray quartzo-feldspathic rocks; iron formation; conglomerate. Rocks ex- gneisses containing biotite, hornblende, or garnet; posed in the east-west line of mountains from subordinate are migmatites, mica schist with kya- Mount Stinear to Goodspeed Nunataks appear to nite and staurolite, and amphibolite. Pegmatite is belong to a single stratigraphic sequence. This rela- common. tion is suggested by the predominantly east-west Metamorphic rocks (shown as "ms" on figure 1) structural trends (figure 1; also see Trail and are as follows: biotite gneiss; quartzite; slate, phyl- McLeod, 1969; Tingey, 1975); conglomerates with lite, and mica schist; amphibolitic rocks; marble, clasts largely of quartzite on Mounts Stinear and December 1976 241 Dummett (east of Mount McCauley) and on Good- I thank D. S. Soloviev, deputy chief of the 18th speed Nunataks ("c" on figure 1), and by the dis- and 19th SAEs, for logistic support and coopera- tinctive sequence of quartzite and amphibolitic tion, and members of the geologic parties of both rocks exposed on Mounts Stinear, Rymill, SAEs for their assistance and for sharing samples McCauley, and Scherger. Rock types in this se- and field data. I thank R. J . Tingey, Australian De- quence (including subordinate mica schist) alter- partment of Natural Resources, for taking me to nate in layers a few meters to over 100 meters in Mount Stinear for a day in 1973 and for keeping me thickness. Cummingtonite is found in amphibolitic informed of the results of Australian work in the rocks. Tingey and England (1973) report a similar Prince Charles Mountains. I thank B. P. Lambert, unit from Mount Menzies. director of the Australian Division of National Metasedimentary rocks exposed on Mount Mapping, for sending me aerial photographs flown Ruker are (1) banded iron formation (150 to 200 by his organization. This research was supported meters thick, bottom not exposed), (2) green slate, by National Science Foundation grant DPP 72- in places with carbonate (1,500 meters), (3) quart- 05797. zite (in part conglomeratic or cross-bedded), slate, and calcareous or ankeritic phyllite alternating in References layers 5 to 50 meters thick (300 to 400 meters), (4) conglomeratic mudstone (10 to 35 meters, "c" Grew, Edward S. 1975. With the Soviets in Antarctica, 1972- on map; figure 2), and (5) green phyllite (top not 1974. Antarctic Journal of the U.S., X(1): 1-8. exposed). The conglomeratic mudstone is brown, Grikurov, G. E., and D. S. Soloviev. 1974. Geologicheskoye stroyeniye gornogo obramleniya lednika Lamberta (po itogam unlayered, and has more matrix than clasts. This polevykh rabot Semnadtsatoy Sovetskoy Antarkticheskoy rock resembles conglomerates from Mount Rubin Ekspeditsii v yanvare-fevrale 1972 g.) [Geologic structure of (Grikurov and Soloviev, 1974, page 27). the mountainous fringe of the Lambert Glacier (from field Dikes, sills, and tabular bodies of mafic rocks up activities by the Seventeenth Soviet Antarctic Expedition in to 100 meters or more across are abundant on January-February 1972.1 Soviet Antarctic Expedition Information Bulletin, 88: 21-29.
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