Surficial Geology 1100 1100 1300 1500 1200 1300 1400

59°30’ 59°15’ 59°0’ 58°45’ 58°30’ 58°15’ 58°0’ 57°45’ 57°30’ 800 1400 900 1100 1800 1800 800 1200 1300 1400 400 1600 500 700 700 1300 1200 1900 800 500 Serpentine Lake 1900 2000 1000 1600 1200 400 1100 1400 1300 1800 400 1300 300 900 1000 Grand Lake 1100 900 1600 1200 1800 1100 2000 1100 2000 2200 1000 1900 1800 1500 1600 2100 2100 1900 700 Department of Environment and Conservation 400 1000 600 1400 1600 1400 1300 2000 500 1100 1100 1100 1600 1000 1400 1500 1700 Department of Natural Resources 1900 2400 800 900 1500 1200 800 900 700 1100 1000 1300 1300 1400 Map No. 1c 1300 900 1800 Spruce Brook 900 1400 1500 2400 George’s 48°45’ Lake 1500 2200 1100 1900 1700 SURFICIAL GEOLOGY 1100 1100 1300 1500 1200 1300 1400 1200 1100 700 1600 1000 Western Newfoundland 48°45’ 900 1100 700 1000 800 600 900 800 1000 1500 500 1600 700 1200 700 1400 1300 900 1500 1000 Gallants ([SRVHG%HGURFN exposed bedrock with little or no sediment or vegetation cover; 1300 1300 1000 1400 700 1500 patches of till and other surficial sediment present but rare; topography and relief 1100 Port au Port 900 1500 1400 variable, and bedrock controlled Bay 900 1000 1700 900 1700 1200 1100 1600 700 1200 600 1300 1400 1500 600 &RQFHDOHG%HGURFNbedrock, mainly concealed by vegetation; patches of till, sand and 1200 300 600 Lourdes 300 800 gravel, and bog (commonly less than 1.5 m thick) and exposed bedrock are common, 900 900 700 1100 1200 but form less than 50% of the unit 1100 1400 1300 700 1000 1100 500 600 400 400 700 1100 'LDPLFWRQ9HQHHUthin (less than 1.5m) discontinuous sheet of diamicton (poorly 700 1600 1500 sorted sediment containing grain sizes from clay to boulders) overlying bedrock; patches 1300 1200 1400 900 of exposed bedrock and thicker sediment cover common; diamicton generally contains 1300 800 300 from 20% to 90% matrix (sand size or finer), and 80% to 10% clasts (greater than sand 400 1500 1000 1500 1300 size); matrices generally dominated by sand with less than 20% silt and clay; maximum 1400 Cold Brook 1400 1100 1400 1300 300 clast sizes from 1 to 2 m diameter; but clasts mostly granules (0.2 to 0.4cmc diameter); 800 600 Mainland 1400 Piccadilly Head 1400 relief and topography variable and bedrock controlled 500 600 1400 1400 200 300 200 1000 600 1000 Kippens 1500 5LGJHG'LDPLFWRQa blanket of diamicton, 1.5 to 20m thick, with a topography Stephenville 500 900 1600 1200 consisting of streamlined elongate ridges 1.5 to 20m high, and 0.2 to 500m long; 700 300 100 400 600 300 diamicton is of similar composition to diamicton veneer; this unit was likely deposited 1000 700 81,7$ 100 400 under actively flowing ice, with the long axis of ridges either parallel or perpendicular to 100 800 400 1100 ice flow 48°30’ 800 1300 Stephenville Crossing 300 1200 +XPPRFN\'LDPLFWRQa blanket of diamicton, 1.5 to 15m thick having irregular 600 700 NOTE: The surficial geology in the Stephenville and Stephenville 600 hummocky topography and relief of 2 to 10m; hummocks are mainly composed of Cape St. George 48°30’ 100 Crossing to Gallants area shows extensive bog development. 800 diamicton, but some may contain poorly sorted sand and gravel; diamicton is of similar 800 Many of these bogs have developed on top of glaciofluvial gravel composition to diamicton veneer; bog is commonly found in low areas between and sand of Unit B. hummocks; this unit was mainly deposited by ice disintegration and stagnation during deglaciation 700 1300 'LDPLFWRQ%ODQNHWsimilar to diamicton veneer; any deposit greater than 1.5m thick; St. George’s minor irregularities of the underlying units are masked but the major topographic form is 600 900 still evident Flat Bay 900 700 700 800 *ODFLRIOXYLDO*UDYHODQG6DQGpoor to well sorted sand and gravel, 1.5 to 50m thick, St. George’s Bay 900 1200 1300 having a diverse surface topography; gravel is pebble to cobble sized, and forms 50 to 900 900 700 95% of the sediment; the unit includes eskers (sinuous, elongate ridges 3 to 15m high, and up to 5km long); kames (moderated to steep sided mounds up to 15m high), and St. Teresa outwash plains (plains with low relief, and a channeled surface, 3 to 20m thick, and up to 100 1100 /,0,72)678'<$5($ 10km long) 700 0DULQHFOD\VDQGJUDYHODQGGLDPLFWRQthis unit consists of a wide range of sediment types, deposited in a marine or glaciomarine environment; moderate to well 1400 800 81,7% 1300 sorted gravel and sand, up to 50 m thick, found in marine terraces and raised beaches; 1300 1000 well sorted silt and clay, up to 90m thick, are found in ice distal glaciomarine deposits 1500 1500 with most of the sediment lying below modern sea level; all of these sediments have been raised to their present elevation by isostatic rebound, resulting in relative sea level fall since deglaciation 48°15’ 900 1600 )OXYLDOlow relief plains with channeled surfaces close to modern rivers, consisting of 1400 1300 moderate to well sorted gravel, sand, silt and clay, deposited in modern river systems 100 1300 800 1000 48°15’ Barachois Brook 1400 &ROOXYLXPa mixture of rock debris and unconsolidated sediment deposited by mass 1600 movement forming aprons at the base of steep slopes 700 800 1500 %RJaccumulations of degraded organic matter deposited in poorly drained low-lying 600 1100 areas 1200 1300 1100 1000 1100 6<0%2/6 Geological Boundary (assumed).............................................................................................. 1000 Esker......................................................................................................................................... 1200 Highland River 1100 1500 1300 600 1400 685),&,$/+<'52675$7,*5$3+,&81,76 1100 1200 1500 1600 700 1500 1400 1600 700 900 1200 8QLW$±*ODFLDO7LOO'HSRVLWV8QLW$±7LOO'HSRVLWV 800 1300 Well yields range from 0 litres per minute (L/min) to 232 L/min and average 48 L/min. 1200 1300 Well depths range from 9 meters (m) to 40 m and average 21 m. The available data 1500 Well depths range from 9 meters (m) to 40 m and average 21 m. The available data 600 1400 1700 indicates that on average, wells drilled within Unit 1 have a moderate potential yield. 1600 400 1500 1400 1300 900 8QLW%±6DQGDQG*UDYHO'HSRVLWV 1200 North Branch 1200 8QLW%±6DQGDQG*UDYHO'HSRVLWV 1500 48°0’ 1500 800 400 1500 Well yields range from 0 L/min to 1,793 L/min and averaged 74 L/min. Well depths 700 1600 800 1600 range from 5 m to 121 m and averaged 29 m. The available data indicates that wells 1100 1300 900 range from 5 m to 121 m and averaged 29 m. The available data indicates that wells 1500 1400 1400 48°0’ drilled within Unit B have a highmoderate potential potential yield. yield. 1400 1000 1200 1400 1500 Elevation in feet above mean sea level. Contour interval approximately 100 feet South Branch 1800 200 1400 1200 1700 400 1500 1700 5()(5(1&( 1300 1300 1600 1:250,000 Surficial Geology -Liverman, D.G.E and Taylor, D.M 1990: Surficial geology of South Branch 1200 1800 1200 insular Newfoundland; preliminary version: Newfoundland Department of Mines and Energy, 800 1600 Geological Survey Branch Map 90-08 900 1700 Codroy 1200 1700 1200 1400 1400 1700 700 1600 1800 300 500 1500 1300 1500 100 1700 Upper Ferry 1500 1700 1500 1700 1500 LIttle AMEC Earth & Environmental 1400 Codroy 1600 1400 A Division of AMEC Americas Ltd. 400 Pond 60°W 58°W 56°W 54°W 52°W 1600 1100 1600 1400 St. Andrew’s 1900 1300 1500 12P 02M Burnt Islands River 1000 1400 1300 1300 1200 St. Anthony 800 51°N 1400 1300 1500 51°N 1400 47°45’ 1500 1400 1400 1200 02L 1700 47°45’ 12I 1100 800 1100 700 900 50°N 50°N 1100 1200 700 1000 200 800 300 900 900 800 12G 12H 300 1000 400 900 300 400 Grand Falls- 49°N Corner Brook 49°N Windsor Gander 700 700 Cape Ray 600 Stephenville NEWFOUNDLAND 12B 300 12A CABOT STRAIT Rose Blanche-Harbour Le Cou 200 48°N 200 48°N 200 200 0 5 10 15 20 25 Channel- Port aux Basques St. John’s Isle aux Morts 11O Channel-Port aux Basques Kilometres 47°N . 47°N 100 50 0 100 59°30’ 59°15’ 59°0’ 58°45’ 58°30’ 58°15’ 58°0’ 57°45’ 57°30’ Kilometers 60°W 58°W 56°W 54°W 52°W.

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