GEOLOGY OF THE TENNANT REGION M Conglomerate, sandstone, siltstone and mudstone D Sandstone AUSTRALIA 1:500 000 GEOLOGICAL SPECIAL NORTHERN TERRITORY C Clastic and carbonate sedimentary rocks Clh Basalt with minor felsic volcanic and sedimentary rocks Conglomerate, sandstone, siltstone; minor mudstone and diamictite 500 Cenozoic Cz Qa Czk NP 134°30' 4 134°45' 135°00' 133°30' 3 000mE 133°45' 134°00' 400 134°15' 50 50 18°00' 18°00' Pr Undifferentiated Renner Group: quartz arenite, sublithic arenite, siltstone; minor mudstone and conglomerate; rare stromatoltic dolostone. Locally Mesozoic M abundant halite pseudomorphs STUART HIGHWAY C 8000 8000 Devonian D Pm Undifferentiated Namerinni Group: quartz arenite, sublithic/lithic arenite, Cz dolostone, mudstone; minor conglomerate. Evaporite pseudomorphs locally 10 abundant; stromatolites Pr Cambrian C Clh Plp Lamprophyre Qa DEVILS SUITE 10 Pr Pgo Syenite Pgd Granite: muscovite-biotite-bearing; porphyritic 5 Pgw Granite/granodiorite; muscovite-biotite and corundum-bearing; equigranular; Pge Leucogranite: muscovite-biotite-bearing Neoproterozoic NPL 10 pegmatitic segregations 20 10 C Pgdu Undifferentiated granite/granodiorite/leuco-microgranite: biotite-muscovite- Cz 18°15' 18°15' 5 bearing Pgy Dacitic to rhyolitic granophyre RENNER MOUNT GRAYLING (D9) GROUP Cz Pr Gleeson Formation Prg Ptc Mudstone, sandstone, dolostone and chert; stromatolitic bioherms and Cz evaporite pseudomorphs Phy Quartz arenite, feldspathic/sublithic arenite Ptb Quartz arenite, sublithic arenite Phv Siltstone, shale, feldspathic/lithic and micaceous arenite MOUNT SHILLINGLAW MOUNT CASTLE Pta Dolostone, limestone, siltstone, sublithic and quartz arenite 10 Phu Quartz arenite, siltstone, shale; minor feldspathic/lithic arenite; rare Pts Quartz arenite, sublithic and lithic arenite, feldspathic sublitharenite, and conglomerate siltstone Phl Shale, siltstone, lithic/feldspathic arenite, minor mudstone and quartz arenite NAMERINNI Pts dz Siltstone; subordinate interbedded sandstone Phi Subarkosic and sublithic arenite, quartz arenite; minor mafic lava, greywacke, (D7) Hanlon Subgroup GROUP Pts Quartz arenite and minor pebbly arenite; conglomerate chert and ironstone MOUNT WILLIERAY d Phe Feldspathic sublithic arenite, quartz arenite; minor conglomerate 10 Pm Ptm Sublithic/lithic arenite, feldspathic arenite, siltstone; dolostone, sandy 10 dolostone; minor conglomerate Devils Suite (g6) Pr Clh Phb Basaltic lava; feldspathic/lithic arenite and quartz arenite, minor trachyte; rare 30 C 45 Pgw Pge Pgd Pgd u Pgo Pgy? volcaniclastic arenite and siltstone, and chert 15 18°30' Siltstone, feldspathic/lithic arenite, mudstone, limestone and dolostone; 18°30' 25 Phf MOUNT HALL stromatolites Pthw Vesicular andesitic lava; mudstone, siltstone; cherified calcareous siltstone, 25 Phc Quartz arenite, feldspathic/lithic arenite; minor siltstone and altered mafic sandstone; stromatolites ASHBURTON lava 79 MOUNT HAWKER 79 50 5 50 Pthc Sublithic/volcanilithic arenite Upper Wauchope Subgroup HATCHES CREEK GROUP Warrego Granite Elkedra Granite Devils Marble Granite Gosse River East Syenite Pr TOMKINSON CREEK GROUP Qa DAVENPORT EVENT Pthe Sublithic//lithic/volcanilithic arenite, feldspathic sublitharenite, pebbly arenite; acid to intermediate volcanic rocks particularly at top Phj Felsic lava; minor tuff and ashstone 45 Ptc Pha Dacitic and rhyolitic ignimbrite, lava and tuff; minor feldspathic/lithic, Carmilly Formation Ptc volcaniclastic/tuffaceous arenite and siltstone Pr Ptb Phd Subarkosic and sublithic, volcaniclastic/tuffaceous arenite, siltstone and Bootu Formation Ptb Yaddanilla Sandstone Phy shale; minor felsic volcanic rocks including lava, tuff, and cherty ashstone Phs Subarkosic, sublithic and lithic (partly volcaniclastic?) arenite and quartz RANGE Pthm Lithic/sublithic/volcanilithic arenite, pebbly arenite; shale and siltstone C Vaddingilla Formation Phv arenite, commonly pebbly; minor conglomerate, greywacke and pyroclastic Attack Creek Formation Pta particularly at top Clh STUART HIGHWAY 40 60 Lower Wauchope Subgroup rocks Canulgerra Sandstone Phu Short Range Sandstone Pts Pthb Polymictic orthoconglomerate M Ptsdz 30 Lennee Creek Formation Cz Deagan Member Pts d Phl (T5 & T6) Pln Quartz- mica schist, metamorphosed rhyodacitic volcanics; quartzite; minor (T5 & T6) Alinjabon Sandstone 60 Morphett Creek Formation Ptm Phi cherty tuff and conglomerate; amphibolite Hanlon Subgroup Pta Errolola Sandstone Phe Pdl Po Undifferentiated felsic ignimbrite, tuff, lapilli tuff and lava; chert; sublithic and ‘WHITTINGTON Clh lithic arenite and wacke; shale and mudstone; pebble beds and Ptm 20 18°45' conglomerate Pg u Undifferentiated biotite granite with porphyritic K-feldspar; locally abundant 18°45' 55 Pts 45 Whittington Range Member Pth w Kudinga Basalt Phb enclaves and xenoliths; locally gneissic 35 Poz Quartz-mica schist, feldspathic/lithic arenite and amphibolite Pgb Ooralingee and Bean Tree Granite: biotite granite with porphyritic K-feldspar, Coodna Member Pth Hayward Creek Formation Frew River Formation c Phf Illoquara and locally abundant enclaves and xenoliths, minor orthogneiss; and Upper Phc Pou Lithic/volcanilithic arenite; heavy mineral-bearing sandstone; felsic tuff Meerie Member Pthm Pth e Coulters Sandstone Phc Sandstone equigranular to porphyritic biotite and biotite-muscovite granite, respectively Pr Pow Sublithic/lithic arenite and siltstone, shale; minor tuff, chert (silicified tuff) Pgy Dioritic to rhyolitic granophyre Ptm Pts 20 d Powv Rhyolitic lava and ignimbrite, tuff and chert (silicified tuff) Pdl Dolerite HATCHES CREEK GROUP Pth 70 TOMKINSON CREEK GROUP Po Porphyry c Pob Felsic crystal-lithic tuff, lapilli tuff, ignimbrite, probable lava, chert; siltstone, 85 Arabulja Newlands Strzeleckie Tinfish 20 50 shale, fine-grained lithic arenite/wacke 20 Palaeoproterzoic Volcanics Volcanics Volcanics Sandstone Pth e 40 45 Rising Sun Pobw Lithic arenite and siltstone, shale; granule conglomerate RANGE Wauchope Subgroup TREASURE SUITE 80 Congl. (in part) Phj (g5?) 30 Yeeradgi Sandstone Phd Pha Pha Php Ledan 55 35 Manga Mauda Member Pov Chert (silicified tuff), tuff; siltstone, shale, fine-grained lithic arenite/wacke Pgz Monzonite, quartz-monzonite (in drillcore); diorite, quartz-diorite 80 40 C Pthm Pln Pgy Pdl Pgb Pg u Pp Lower Schist 50 Pur Pp Felsic porphyry 80 30 40 Unimbra Sandstone Phs (Gwynne Sst) Phs Pom Rhyolitic and rhyodacitic tephra, tuffaceous sandstone, siltstone Pdl Dolerite 10 Blanche Creek Member Treasure Suite (g5?) OORADIDGEE GROUP 20 Pth b Mia Mia Volcanics Treasure Volcanics Poy Undifferentiated lithic/volcanilithic arenite, siltstone, shale; felsic lava, Cz MURCHISON EVENT ? Pgz Pp Pdl ignimbrite, crystal-lithic and lapilli tuff. Quartz arenite, magnetite laminae Poi Felsic tuff and lava; minor feldspathic/lithic arenite and quartz arenite; rare CHURCHILLS HEAD volcaniclastic arenite Brumbreu Pou Poa Ooralingie & Bean Tree Gr Porphyry Poy Lithic/sublithic/volcanilithic arenite, siltstone, shale; sandstone, magnetite Poi Pot Poi Poz s Pot Rhyolitic to dacitic lava and pyroclastic rocks including ignimbrite; felsic 40 sandstone laminae; welded and non-welded felsic crystal-lithic tuff and lapill tuff; minor Formation Pow v intrusives; feldspathic/lithic (including volcaniclastic), arenite, quartz arenite; 50 80 D volcanic Yungkulungu Formation member Pog felsic lava and ignimbrite Pts minor basaltic lava 50 lithofacies sedimentary lithofacies Taragan Sandstone Poa Feldspathic/sublithic arenite, quartz arenite, pebbly arenite, conglomerate; 7900 7900 ~ Unnamed Monzonite Porphyry Poyv Felsic crystal-lithic tuff and lapilli tuff; rhyolitic and rhyodacitic lava and 19°00' (T5) Wundirgi Formation Edmirringee Kurinelli Sandstone Pok Undifferentiated Bullion Lander beds/ ignimbrite; volcanilithic arenite with interbedded siltstone minor siltstone, mudstone and altered felsic lava 15 SHORT Pth 19°00' c Pow Poyi Volcanics Pog Basaltic lava; minor volcaniclastic arenite and felsic lava 30 Warrego Ooradidgee Schist Woolla 30 20 Gneiss Poyi Welded and non-welded felsic crystal-lithic tuff and lapilli tuff; minor felsic Pok Subarkosic/sublithic/lithic arenite, quartz arenite, siltstone; minor felsic and 30 Volcanics Poy Rooneys Pon Group s Por Epenarra volcanic lava and ignimbrite mafic lava and tuff, mudstone, shale, slate and schist C Ptm Pth Pob Formation 75 25 c Pth m,e Volcanics Pon Greywacke, siltstone, subarkosic/sublithic/lithic arenite; minor felsic porphyry; 30 Bernborough 35 40 locally schistose 30 30 Pov Formation 60 Tennant Creek Por Felsic lava and pyroclastic rocks including ignimbrite and lapilli tuff; Qa 70 55 v 40 Pom ~ Po Plb Pll Supersuite (g4) volcaniclastic arenite and conglomerate; minor altered mafic lava RANGE 50 Monument Non-outcropping undifferentiated Pob w volcanic Pors Quartz arenite, volcaniclastic arenite, conglomerate; minor felsic volcanics C OORADIDGEE GROUP Ooradidgee Group ? Pth b Formation lithofacies Pgt Pp Pgg Pgc Pgm Pgh Pg 20 Whippet Sandstone Poyv 45 Plb Metamorphosed pelite, feldspathic/lithic and quartz arenite, quartz-mica Member Pth m,e schist with andalusite, porphyritic felsic volcanics and amphibolite 5 20 55 Pth m,e Pll Quartz-mica schist, feldspathic schist and gneiss; quartzite; amphibolite 50 TENNANT EVENT ? ?? 40 Cz plugs and probable flows 70 Tennant Ck Granite Porphyry Cabbage Gum Granite Channingum Granite Mumbilla Granodiorite Hill of Leaders Granite Unamed Granite 70 Pev 40 Pts Warramunga Formation Pw Junalki Formation Pj Pj 40 (T4) (lm) 30 35 Woodenjerrie