Flowerdew, M.J.

Haselwimmer, C.E.

Riley, T.R.

NERC Open Research Archive

07520254161 7884707168758570406570666466205115103845080357565732520757242688063417024207550394267511214304028423772106015 3015253656081106584357075627665 708058805880481220555080757456°W56°W57°W57°W58°W58°59°W59°60°60°61°61°W62°62°W63°63°W64°64°W55°W65°W63°S63°S63°30'S63°30'64°S64°64°30'S64°30'S65°65°S65°30'65°30'S66°66°S66°30'S66°30'S727201858J A M E S  R O S S  I S L A N DJOINVILLE ISLANDD'URVILLE ISLANDBRABANT ISLANDA N V E R S  I S L A N DDundee IslandTrinity Is landRongé IslandWiencke  IslandS n o w  H i l l  I s l a n dR o b e r t s o n  I s l a n dSeymour IslandBransﬁeld IslandAnderson IslandCockburn IslandV e g a  I s l a n dAstrolabe IslandTower IslandTa b a r i n  P e n i n s u l aHope BayCape DubouzetMapple GlacierView PointCape LongingPedersen NunatakCape FairweatherCape DisappointmentTarget HillCape FramnesSpur PointCape RobinsonCape AlexanderCape WorlseyCape LegoupilCape RoquemaurelCape HerschelCape MurrayCape GarciaCape KaterANTARCTIC SOUNDBotany BayEyrie BayCro f t  BayWhisky BayBrandy BayLong IslandE R E B U S  A N D  T E R R O R  G U L FW E D D E L L  S E ARöhss  BayLarsen  In le tE x a s p e r a t i o n  I n l e tStratton IneltS c a r  I n l e tA d i e  I n l e tL A R S E N  I C E  S H E L FPRINCE    GUSTAV     CHANN ELSe al  Nunat aksBone BayC h a r c o t  B a yWi lhe lmina  BayChar l ot t e BayA n d v o r d  B a yF l a n d r e s  B a yB e a s c o c h e a  B a yHu gh es  B ayBa r i l a r i  BayJ AS ON   PE NI NS UL ACHURCHI LL PENI NSULACabi net  I nl etStanley IslandC o l e  P e n i n s u l aMi l l  I nl etEagle IslandFOYN  COASTOSCAR     II COASTNORDENSKJÖLD  COASTStandring Inlet2b2b2c2b2b331313131313131313131313131313131391313131313131111999911132a2a2a2a22233377988333333331a1a1a1b1a1a1a1a1c 1c33222222222224b34b77910Gd5G10G-Gd5D10Qd5G5To5G-Gd5QD4b4b10G10G10Gd10Ga-Gd5QM5G5G5QM5QM5QM5QM5QM5QM5QM5To5QM5Gd5To5Ga-Gd5Ga-Gd5Gd-To5Gd-To5Gd-To5Gd-To1c5Ga5G5Gd-To5Gd-To5Gd-To5Gd-To5Ga5Ga5Gd-To10Ga-Gd5To1b4a4a1365To5To5QM5Ga5Ga10Ga-Gd10D10G10G5G5G5G4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b10G5G10Gd1311111111111112121111AA1B1B0 10 20 300 10 20 30 40 50kilometresScale: 1:625 000milesEden Gl.63°30'S64°S62°W63°W64°W65°S65°30'66°66°30'67°S56° 55°W57°58°W75716080808565708470108050727057°30'W57°30'W58°W58°W63°30'S63°30'S63°45'S63°45'S13131313133134b4b4b2a2a2a2b2b2a2a2a4b4bCain NunatakBald HeadView PointE y r i e  B a yBotany BayEagle Is landEgg IslandB r oa d  V a ll e y0 50 5 10kilometresScale: 1:200 000miles4bMAP A: GEOLOGY OF THE REGION AROUND BOTANY BAY783512202420132426121163806070242058503912751458241559°W59°W59°30'W59°30'W60°W60°W64°15'S64°15'S64°30'S64°30'SCape LongingCape SobralMount TuckerMount ElliottTower PeakL a r s e n  I n l e tSobral PeninsulaLongi ng Ga pLongi ng Peninsula22223337798885G5Gd4b4b4b4b10G0 5 100 5 10 15 20kilometresScale: 1:300 000milesMAP B: GEOLOGY OF THE REGION AROUND THE SOBRAL AND LONGING PENINSULASA A1100020000-1000-2000metresB4b4b 4b1b 1b1a1a1a1a1a1b4a 4b 635To 5QM5Gd10Ga-GaTrinity PeninsulaStandring InletS c a r  I n l e t Cape FramnesBastion Peak4b1000metres0-1000-2000B1GEOLOGICAL CROSS SECTIONS ALONG THE LINES DRAWN ON THE MAPHorizontal scale 1:625 000    Vertical exaggeration x 5FROM NEAR CAPE LEGOUPIL TO SNOW HILL ISLAND (Line A-A1)FROM BASTION PEAK TO CAPE FRAMNES (Line B-B1)5Gd2c 4b 13132b2b 2a 2a39 9 11 11 1113Botany Bay BrandyBayMount Haddington (ice cap?)Snow Hill IslandEden Glacier1bGulliver NunataksPaleocenePERIOD EPOCH/AGE VOLCANIC AND SEDIMENTARY ROCKSGEOLOGICAL LEGENDGEOLOGICAL SYMBOLSOTHER SYMBOLSGeological units are coloured as dark and light tints representing exposed (nunataks) or inferred geology (under ice or snow)PLUTONIC AND METAMORPHIC ROCKSEarlyLatePALEOGENENEOGENESeymour Island GroupRichly fossiliferous, shallow water Palaeocene - Eocene ﬁne grained volcaniclastic sedimentary rocks restricted to Seymour Island and Cockburn Island.James Ross Island Volcanic GroupMiocene - Recent basic volcanic lavas, tuffs, hyaloclastite breccias. Exposed widely in northeast Graham Land, particularly James Ross Island and Tabarin Peninsula area.Marambio GroupFossiliferous, shallow water Upper Cretaceous - Lower Palaeocene (including the K-T boundary) ﬁne grained volcaniclastic sedimentary rocks exposed widely on Seymour, James Ross and Vega islands.Gustav GroupMid Cretaceous coarse grained volcaniclastic rocks up to 2.5km thickness exposed extensively on western James Ross Island, with minor outcrops at Cape Longing and Robertson Island. Deeper water environment with sporadic macrofossils.Pedersen FormationEarly Aptian age, conglomerate dominated submarine fan deposits and sandstone apron deposits. Post-depositional deformation. Only exposed on Pedersen Nunatak (140 m thickness) and Sobral Peninsula (up to 1 km thickness). Possible equivalent to Lagrelius Point Formation of lower Gustav Group.Nordenskjöld FormationRadiolarian-rich mudstones and interbedded tuffs of Kimmeridgian - Berriasian age. Exposed at scattered locations along the eastern margin (e.g. Sobral Peninsula and Joinville Island) of Graham Land reaching a maximum thickness of 800m.Legoupil FormationHope Bay FormationView Point FormationGraham Land Volcanic GroupMapple Formation and Kenney Glacier FormationSubaerial rhyolitic ignimbrites, crystal-, lithic-, vitric-, lapilli-tuffs and rare pitchstone lava ﬂows. At least 1km thick, exposed extensively along the east coast. Dated in the interval 167 - 171 Ma. Interbedded with Botany Bay Group (3) at the base of the succession.Cape Framnes BedsCoarse grained sandstones containing a Kimmeridgian - early Tithonian molluscan macrofauna. Only exposed at Cape Framnes on Jason Peninsula. Probable basal strata of the Larsen Basin.Botany Bay GroupTerrestrial, plant-bearing sedimentary rocks exposed at several locations along the east coast. Four formations (Mount Flora Fm, Camp Hill Fm, Tower Peak Fm, Mt Mayhew Fm) have been identiﬁed. The upper part of the succession is coeval with the Graham Land Volcanic Group (4).Trinity Peninsula GroupVariably deformed siliclastic turbidite succession with rare interbedded basic volcanic rocks. Exposed extensively across northern and eastern Graham Land. The View Point Formation (2a) is at least Carboniferous in age, with the Hope Bay and Legoupil formations Permian - Triassic in age; conﬁrmed by Triassic bivalves at Cape Legoupil.Standring Inlet BasaltsBasaltic and basaltic-andesite lava ﬂows. They predate and are coeval with silicic volcanic rocks of the region (4b). Only exposed on Jason Peninsula at Standring Inlet and Stratton Inlet.Cretaceous PlutonismTypically granodiorite - gabbro hybrid plutons which outcrop widely Emplacement age of 85 - 105 Ma. Associated with dolerite dyke intrusion.G, granite; Gd, granodiorite; D, diorite; Ga, gabbroJurassic PlutonismWidespread acid plutons of dominantly granite-tonalite-quartz monzonite composition. Probable sub-volcanic equivalents of the Early - Middle Jurassic silicic volcanic rocks (4b). Associated with felsic dyke/sheet intrusion.G, granite; Gd, granodiorite; QM, quartz monzonite; To, tonalite; Ga, gabbroCRETACEOUSJURASSICTRIASSIC / PERMIANLateMiddleEarly1013121198764a4b352 2a2b2cCleavage or metamorphic foliation55Ice shelfContorted bedding10Bedding70Overturned bedding42FaultStrike-slip faultCoastline SeaFault brecciaMaﬁc dykesMostly ﬁne grained feldspar-phyric dolerite dykes. Typically <1m thickness and steeply dipping. Probable age range, 95 – 110 Ma.Felsic dykesPorphyritic quartz-feldspar felsic dykes and sheets. Up to 80m in thickness and shallowly dipping. Associated with Middle Jurassic plutonism (5) and volcanism (4)Normal fault (tick on downthrow side)1c1a1bOrdovician - Carboniferous crystalline basementEarly Ordovician (484 - 487 Ma) diorite gneisses on the Eden Glacier, Devonian (393 - 397 Ma) orthogneiss and Carboniferous (327 ± 9 Ma) at Target Hill.Triassic plutonism and migmatitesExtensive plutonism and migmatisation in southern Graham Land and northern Palmer Land at 227 Ma and 233 - 236 Ma. This event may have continued until ~215 Ma.Permian metamorphismTwo generations of Permian metamorphism are recorded as zircon overgrowths and granitic migmatisation. The two phases are at 275 and 257 Ma.CARBONIFEROUS/DEVONIAN/ORDOVICIANREFERENCESAitkenhead, N. 1964. The Trinity Peninsula Series of northeast Graham Land. PhD thesis, University of Birmingham. 168pp.Aitkenhead, N. 1975. The geology of the Duse Bay-Larsen Inlet area, north-east Graham Land (with particular reference to the Trinity Peninsula Series). British Antarctic Survey Scientiﬁc Reports, No. 51, 62pp.Birkenmajer, K. 1992. Trinity Peninsula Group (Permo-Triassic?) at Hope Bay, Antarctic Peninsula. Polish Polar Research, 13, 215-240.Birkenmajer, K. 1993. Jurassic terrestrial clastics (Mount Flora Formation) at Hope Bay, Trinity Peninsula (West Antarctica). Bulletin of the Polish Academy of Sciences, Earth Sciences, 41, 23-38.Crame, J.A., Pirrie, D., Riding, J.B. & Thomson, M.R.A. 1991. Campanian -  Maastrichtian (Cretaceous) stratigraphy of the James Ross Island area, Antarctica. Journal of the Geological Society, London, 148, 1125-1140.Del Valle, R.A. & Medina, F.A. 1985. Cape Marsh Geology, Robertson Island, Antarctica. Contribucion del Instituto Antarctico Argentino, No. 309.Del Valle, R.A., Lirio, J.M., Lusky, J.C., Morelli, J.R. & Nunez, H.J. 1997. Jurassic trees at Jason Peninsula, Antarctica. Antarctic Science, 9, 443-444.Elliot, D.H. 1965. A geological comparison between N.W. Trinity Peninsula and the Nordenskjöld Coast of Graham Land. PhD thesis, University of Birmingham. 146pp.Elliot, D.H. 1967. The geology of Joinville Island. British Antarctic Survey Bulletin, 12, 23-40.Elliot, D.H.  & Gracanin, T.M. 1983. Conglomeratic strata of Mesozoic age at Hope Bay, Antarctic Peninsula. In: Antarctic Earth Science, eds. R.L. Oliver, P.R. James & J.B. Jago, 303-307. Cambridge University Press.Farquharson, G.W. 1983. Evolution of Late Mesozoic sedimentary basins in the northern Antarctic Peninsula. In: Antarctic Earth Science, eds. R.L. Oliver, P.R. James & J.B.  Jago, 323-327. Cambridge University Press.Farquharson, G.W. 1984. Late Mesozoic, non-marine conglomeratic sequences of northern Antarctic Peninsula (The Botany Bay Group). British Antarctic Survey Bulletin, 65, 1-32.Fleet, M. 1966. The geology of the Oscar II Coast, Graham Land. PhD thesis, University of Birmingham. 138pp.Fleet, M. 1968. The geology of the Oscar II Coast, Graham Land. British Antarctic Survey Scientiﬁc Reports, 59, 46pp.Flowerdew, M.J. 2008. On the age and relation between metamorphic gneisses and the Trinity Peninsula Group, Bowman Coast, Graham Land, Antarctica. Antarctic Science, 20, 511-512.Flowerdew, M.J. 2010. Geological mapping at the Foyn Coast, Graham Land. AD6/2R/2009/GL1. British Antarctic Survey unpublished report.Hamer, R.D. 1984. The geochemistry and age of the Danger Islands pluton, Antarctic Peninsula. British Antarctic Survey Bulletin, 64, 1-19.Haselwimmer, C.E., Riley, T.R. & Liu, J.G. 2011. Lithologic mapping in the Oscar II Coast area, Graham Land, Antarctic Peninsula using ASTER data. International Journal of Remote Sensing, 32, 2013-2035.Hathway, B. 2000. Continental rift to back-arc basin: Jurassic - Cretaceous stratigraphical and structural evolution of the Larsen Basin, Antarctic Peninsula. Journal of the Geological Society, London, 157, 417-432.Hathway, B. & Kelley, S.P. 2000. Sedimentary record of explosive silicic volcanism in a Cretaceous deep-marine conglomerate succession, northern Antarctic Peninsula. Sedimentology, 47, 451-470.Hathway, B. & Riding, J.B. 2001. Stratigraphy and age of the Lower Cretaceous Pedersen Formation, northern Antarctic Peninsula. Antarctic Science, 13, 67-74.Hunter, M.A., Cantrill, D.J., Flowerdew, M.J. & Millar, I.L. 2005. Middle Jurassic age for the Botany Bay Group: implications for Weddell Sea Basin creation and southern hemisphere biostratigraphy. Journal of the Geological Society, London, 162, 745-748.Leat, P.T., Scarrow, J.H. & Millar, I.L. 1995. On the Antarctic Peninsula batholith. Geological Magazine, 132, 399-412.Marsh, A.F. 1968. Geology of parts of the Oscar II and Foyn Coasts, Graham Land.  PhD thesis, University of Birmingham, 291pp.Millar, I.L., Milne, A.J. & Whitham, A.G. 1990. Implications of Sm-Nd garnet ages for the stratigraphy of northern Graham Land, Antarctic Peninsula. Zentrablatt für Geologie und Paläeontologie, Teil, 97-104.Millar, I.L., Pankhurst, R.J. & Fanning, C.M. 2002. Basement chronology and the Antarctic Peninsula: recurrent magmatism and anatexis in the Palaeozoic Gondwana Margin. Journal of the Geological Society, London, 159, 145-158.Milne, A.J. 1990. The pre-Mesozoic geological evolution of Graham Land, Antarctica. PhD thesis, Open University. 315pp.Pankhurst, R.J. 1982. Rb-Sr geochronology of Graham Land, Antarctica. Journal of the Geological Society, London, 139, 701-711.Pankhurst, R.J., Riley, T.R., Fanning, C.M. & Kelley, S.P. 2000: Episodic silicic volcanism in Patagonia and the Antarctic Peninsula: chronology of magmatism associated with break-up of Gondwana.  Journal of Petrology, 41, 605-625.Pirrie, D., Crame, J.A. & Riding, J.B. 1991. Late Cretaceous stratigraphy and sedimentology of Cape Lamb, Vega Island, Antarctica. Cretaceous Research, 12, 227-258.Rees, P.M. 1993. Revised interpretations of Mesozoic palaeogeography and volcanic arc evolution in the northern Antarctic Peninsula region. Antarctic Science, 5, 77-85.Riley, T.R. 2005. Geological ﬁeldwork on Joinville Island. AD6/2R/2004/GL1. British Antarctic Survey unpublished report.Riley, T.R. 2010. Geological ﬁeldwork on the Oscar II Coast, Graham Land (Churchill Peninsula area). AD6/2R/2008/GL1. British Antarctic Survey unpublished report.Riley T.R. & Leat, P.T. 1996. Geological ﬁeldwork of the Cape Disappointment area and Jason Peninsula,  Oscar II Coast, eastern Graham Land. AD6/2R/1995/GL7. British Antarctic Survey unpublished report.Riley, T.R. & Leat, P.T. 1999. Large volume silicic volcanism along the proto-Paciﬁc margin of Gondwana: lithological and stratigraphcial investigations from the Antarctic Peninsula. Geological Magazine, 136, 1-16.Riley, T.R., Leat, P.T., Pankhurst, R.J. & Harris, C. 2001. Origins of large volume rhyolitic volcanism in the Antarctic Peninsula and Patagonia by crustal melting. Journal of Petrology, 42, 1043-1065. Riley, T.R., Crame, J.A., Thomson, M.R.A. & Cantrill, D.J. 1997. Late Jurassic (Kimmeridgian-Tithonian) macrofossil assemblage from Jason Peninsula, Graham Land: evidence for a signiﬁcant northward extension of the Latady Formation. Antarctic Science, 9, 434-442.Riley, T.R., Flowerdew, M.J., Hunter, M.A. & Whitehouse, M.J. 2010. Middle Jurassic rhyolite volcanism of eastern Graham Land, Antarctic Peninsula: age correlations and stratigraphic relationships. Geological Magazine, 581-595.Riley, T.R., Leat, P.T., Kelley, S.P., Millar, I.L & Thirlwall, M.F. 2003. Thinning of the Antarctic Peninsula lithosphere through the Mesozoic: evidence from Middle Jurassic basaltic lavas. Lithos, 67, 163-179.Saunders, A.D. 1982. Petrology and geochemistry of alkali-basalts from Jason Peninsula, Oscar II Coast, Graham Land. British Antarctic Survey Bulletin, 55, 1-9.Smellie, J.L. 1991.  Middle Late Jurassic volcanism on the Jason Peninsula, Antarctic Peninsula, and its relationship to the break up of Gondwana. In: Gondwana 7 proceedings, eds. H. Ulbrich & A.C. Rocha Campos, 685-699. Universidade de Sâo Paulo.Smellie, J.L., Roberts, B. & Hirons, S.R. 1996. Very low- and low-grade metamorphism in the Trinity Peninsula Group (Permo-Triassic) of northern Graham Land, Antarctic Peninsula. Geological Magazine, 133, 583-594.Stubbs, G.M. 1968. Geology of parts of the Foyn and Bowman coasts, Graham Land. PhD thesis, University of Birmingham. 245pp.Thomson, M.R.A. & Pankhurst, R.J. 1983. Age of post-Gondwanian calc-alkaline volcanism in the Antarctic Peninsula region. In: Antarctic Earth Science, eds. R.L. Oliver, P.R. James & J.B. Jago, 328-333. Cambridge University Press.Vaughan, A.P.M., Trouw, R., Bradshaw, J., Dean, A.A. & Millar, I.L. 2001. The Geology of northern Graham Land, including northern Gerlache Strait localities, and parts of eastern Trinity Peninsula from Mount Cardinal to Sobral Peninsula, with special emphasis on View Point. British Antarctic Survey unpublished report. AD6/2R/2001/GL3.Whitham, A.G. 1993. Facies and depositional processes in an Upper Jurassic to Lower Cretaceous pelagic sedimentary sequence. Antarctica. Sedimentology, 40, 331-349.Whitham, A.G. & Doyle, P. 1989. Stratigraphy of the Upper Jurassic - Lower Cretaceous Nordenskjold Formation of eastern Graham Land, Antarctica. Journal of South American Earth Sciences, 2, 371-384. Geological Map of Eastern Graham Land, Antarctic PeninsulaBAS GEOMAP 2 Series, Sheet 1, Edition 11:625 000 ScaleGeological interpretation and map compilation by T.R. Riley, M.J. Flowerdew, and C.E. Haselwimmer. Geological cross sections compiled by T.R. Riley and C.E. Haselwimmer. Data preparation, digital cartography, design, and layout by C.E. Haselwimmer. Geological mapping and digital map production was undertaken as part of the BAS Environmental Change and Evolution (ECE) programme.Base map data for coastlines, rock outcrops, and ice shelves from the Antarctic Digital Database. The Antarctic Digital Database is copyright © 1993-2006 Scientiﬁc Committee on Antarctic Research.Preferred reference for map:RILEY, T.R., FLOWERDEW, M.J. and HASELWIMMER, C.E. 2011. Geological Map of Eastern Graham Land, Antarctic Peninsula (1:625 000 scale). BAS GEOMAP 2 Series, sheet 1, British Antarctic Survey, Cambridge, UK.Projection: WGS 1984 Antarctic Polar Stereographic, Central Meridian: 60°W, Spheroid: WGS84. Latitude of true scale: 71°S.Published by BRITISH ANTARCTIC SURVEY, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom. This geological map is copyright © British Antarctic Survey, Natural Environment Research Council, 2011. All rights reserved.Fold axis of synformMAP AMAP BSobral PeninsulaPrinted by Butler, Tanner and Dennis, Frome, Somerset

Geological Map of Eastern Graham Land, Antarctic Peninsula

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Geological Map of Eastern Graham Land, Antarctic Peninsula

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