Geology of the Avalon Peninsula, Newfoundland 35 15 80 E ADEYTON GROUP (Individual Formations Not Separated on Map Except Bald Hd
Total Page:16
File Type:pdf, Size:1020Kb
GEOLOGY OF THE AVALON LEGEND OI I OI OI 54 15 I I I I I OI I I 10 54 00 50 40 30 20 10 53 00 50 40 52 30 OI OI Dark gray, fine grained diabase dikes 48 15 48 15 PENINSULA, NEWFOUNDLAND Georges K/Ar 201 ± 2.6 Ma (whole rock) (Hodych and Hayatsu, 1980) Rocky Delbys exposure positive aeromagnetic anomaly Brook 100 500 Ragged TRIASSIC Pond500 Lady Popes Cove F West Pt. Islands F Harbour 100 20 Diabase and diorite dikes containing euhedral plagioclase (parts of 1K, 1L, 1M, 1N and 2C) Pond Ireland’s Eye Pt. cly Barton phenocrysts F Ireland’s 100 10 Milton Grindstone 0 500 Eye Ireland’s Eye F Hd. F 40 IONA ISLANDS INTRUSIVE SUITE CLARENVILLE GRANITE LINE DEVONIAN 30 F Harcourt Anthony I. IONA ISLANDS Clarenville POWDER HORN Monroe Ivanhoe Pink to red, medium grained, biotite granite 75 Th 5 Scale 1:250 000 INTRUSIVE DIORITE COMPLEX OR EARLIER Map 88-01 cly e Bri White 50 T Green I. Gray, medium grained diorite, gabbro and olivine gabbro Granite h SUITE Somerset Rock 00 Gin o 15 1 30 Thoroughfare r Shoal Mn o Cove u POWDER HORN DIORITE COMPLEX 50 20 (Digital reproduction) Harbour Lst g Reddish-pink, medium grained granite and granite dikes and H h Red T f 0 5 10 15 20 25 Grates Fine- to medium-grained diorite, gabbro and minor granite I 10 a 10 ND sills, locally containing abundant gabbro inclusions Pt. M r 1 0 cly S Lst 0 e Point Pigeon 10 T I Clarenville Aspey 55500 F Stn SOU L I Snooks Pt. U Grates Cove Geology compiled by A. F. King 10 100 Brook Lst Silldown Pt. 10 10 F Mn A Harbour Fagans 40 Breakheart Point Diabase, diorite and gabbro sills SILURIAN(?) 35 F Duck I. BACCALIEU Tilton Hd. Pond kilometres 30 North Bird I. 25 DE VERDE SYNC Clarenville cly Goldmine Head F Map series edited by S. P. Colman-Sadd and J. P. Hayes South Fe 500 South Bird I. AY Sla E B WABANA GROUP (individual formations not separated on map) Elliot’s Brittania V 10 20 F 30 30 00 Baccalieu O East Hd. Cove Contours in feet above maen sea level. Contour interval 100 feet. 1 30 C TICKLE 15 Daniel’s Gravel Head Formation: dark shale; layers of phosphatic and ACKNOWLEDGEMENTS Red Head Cove Island 500 500 Cove 15 15 hematitic ironstone and silty shale near base Verge I. F N Previously unpublished mapping by A.F. King benefitted Copies of this map may be obtained from the Geoscience O Weybridge Cooks 30 Gull Island Formation (Upper Ore Bed): oolitic reddish-brown M Fe Sla 500 greatly during its early stages from the guidance of W.D. Publications and Information Section, Geological Survey, N Hickman’s Harbour L Cove ironstone A Split Pt. 500 F O Lady Cove S Deep Sla Bruckner (Conception Group), V.S. Papezik (Harbour Main Department of Mines and Energy, P.O. Box 8700, St. John’s, 20 10 East Random Hd. 50 100 R 0 0 Bight 50 Stn 50 45 Grebes Nest Point Formation: dark shale, siltstone, and sand- LOWER T 20 20 Perlican I. Newfoundland, Canada, A1B 4J6. Bay de Verde Group) and T. Fletcher (Cambrian biostratigraphy, Cape St. H Lady 45 25 e W ARM 35 E S d stone T Pt. Stn 25 r ORDOVICIAN F Lst 40 30 e Mary’s peninsula). Special thanks are extended to M.M. http://www.geosurv.gov.nf.ca Old Perlican Arenig Adeytown 100 V E HARCOURT GROUP (individual formations not separated on map) 50 10 55 100 e IN d L Anderson, T. Calon, B. Greene, J. Malpas, S.J. O’Brien, C.F. 25 y IC Scotia Formation (Middle Ore Bed): oolitic, reddish-brown 500 D 60 a T O U N 10 B N O’Driscoll, G. Parsons, R.K. Stevens and H. Williams for R AND O M S A Clarenville Formation: gray to black, micaceous shale; minor ironstone New Low Point 50 20 Lead D siltstone containing cone-in-cone limestone concretions comments made in the field and for informal discussions. 500 West Random Hd. Melbourne 10 EA WABANA GROUP St. Jones 0 Cove H Tremadoc 10 Powers Steps Formation: graptolitic shale and minor siltstone Within Sla 5 Sibleys 35 Capable field assistance was provided by J. Hill, T. Brace Geological cartography by Tony Paltanavage. Southport O Elliott Cove Formation: gray, green to black, silty, micaceous and sandstone; phosphatic and pyritic, oolitic ironstone at base Pb Cove R and D. Andrews. Hillview Long I. Caplin Cove B shale, slate and siltstone; limestone concretions North West Hatchet M Upper Redmans Fm. LA Brook Cove 0 Cambrian H. Miller and J. Tod are thanked for the interpretation of 500 50 Gooseberry Cove Brownsdale F Little Heart’s 10 70 BELL ISLAND GROUP (separated into lower, upper and Redmans Southeast Pt. Hants Hd. Manuels River Formation: black shale and lenses of limestone; 50 ARMCaplin Ease geophysical data, and C.F. O’Driscoll for the compilation 35 100 30 55 New Chelsea Flambro Hd. Formation on map) S O U T 40 Hodge’s Cove mafic pillow lava and pyroclastics, including Hay Cove and Recommended citation: of the mineral occurrences. 5 100 H W E S T Cove Chapel Arm members 00 500 Dominion Formation (Lower Ore Bed): oolitic, reddish-brown Long 00 The offshore geological data were provided by the King, A.F. OI 40 Island Cove 45 1 Island Fe OI 48 00 Beach Lower Island Cove 48 00 ironstone Pond Atlantic Geoscience Centre, Geological Survey of Canada, 1988: Geology of the Avalon Peninsula, Newfoundland 35 15 80 E ADEYTON GROUP (individual formations not separated on map except Bald Hd. Pittmans NOTE: Ochre Cove Formation: interbedded, thin sandstone and shale, and have been published previously in a less detailed form (parts of 1K, 1L, 1M, 1N and 2C). Newfoundland Department 500 IN 10 45 L 20 Pond Smith point Formation) 10 and glauconitic sandy siltstone Arenig(?) T C 0 30 10 0 in King et al., 1986. Special thanks are extended to G.B.J. of Mines and Energy, Map 88 – 01. I 50 5 Fe 500 T 55 10 The purchaser agrees not to provide a digital reproduction or copy of this product to a UL N 75 00 ? UPPER CAMBRIAN(?) TO Fader for his assistance in compiling the data for this map. 5005 5 Chamberlains Brook Formation: green and red shale or slate 45 45 A 25 80 REDMANS FORMATION 0 10 third party. Derivative products should acknowledge the source of the data. T 00 Winterton 50 and thin limestone beds; manganiferous bed near base; spilitic ? LOWER ORDOVICIAN FA 500 Fe Funding for part of this project was provided by the 5 Middle Cambrian 00E Burnt Point Gray to white orthoquartzite and minor siltstone 5 ISLAND GROUP BELL St. Jones Hd. N cherty pillow lava, including Cape Dog and Hopeall Head Natural Sciences and Engineering Research Council of E AUL I F L Gull Island 00 members 5 Western C 1 NC I Beach Formation: micaceous siltstone, shale and sandstone; Canada under Grant A-7052 to A.F. King. T Centre for Earth Resources Research, Department of Pond E DISCLAIMER: 70 N minor oolitic ironstone (McGraw and Eastern Head members) HA 45 N Northern Bay C 00 A I The base map was assembled by the Geological Survey C L Brigus Formation: red, pink and green shale or slate and thin 1 Earth Sciences, Memorial University of Newfoundland, 500 L . IL Bk 500 40 C5 limestone beds; basal conglomerate where formation rests H Bay of Canada from maps published at the same scale by the 20 10 N The Geological Survey, a division of the Department of Mines and Energy (the “authors Little Bell Island Formation: white sandstone interbedded with St. John’s, Newfoundland A1B 3X5. North Hd. EACH Y 15 75 Northern15 directly on Precambrian rocks B 100 80 S and publishers”), retains the sole right to the original data and information found in any dark silty shale Surveys and Mapping Branch, Department of Energy, Mines 15 Fe 50 500 55 BY 30 A Fe product produced. The authors and publishers assume no legal liability or and Resources in 1970, 1971. Tremadoc(?) E SMITH POINT FORMATION E 500 New Perlican Ochre Pit Cove Kellys Island Formation: dark silty shale and thickly bedded\ S responsibility for any alterations, changes or misrepresentations made by third parties R HARCOURT GROUP 1 L The bathymetric contours were provided by the Canadian 00 D Pink massive limestone containing red shale partings and algal 0 OME T 500 E 30 quartzose sandstone 0 B A Y N with respect to these products or the original data. Furthermore, the Geological 5 C N Deer H 10 structures H O Hydrographic Service from the Natural Resource Map series E a C r Deer Harbour Hd. 15 C b P Fe Survey assumes no liability with respect to digital reproductions or copies of original o 45 u and from unpublished maps. 35 NG r Western Bay Hd. MIDDLE CAMBRIAN(?) TO 500 5 Souther Pt. 20 products or for derivative products made by third parties. Please consult with the O 0 15 Bonavista Formation (locally absent): red, green and purple shale 0 L Western Bay Big I. 500 15 LOWER ORDOVICIAN 1 0 S or slate and thin limestone beds; local quartz-pebble 0 Geological Survey in order to ensure originality and correctness of data and/or 5 Heart’s N Sunnyside SPREAD EAGLE GABBRO (and equivalents) Sia A products.