Map No.1 SURFICIAL GEOLOGY - Newfoundland and Labrador · patches of till and other surficial...
1
Soulis Brook Exploits River Gander River Dog Bay Loon Bay Hare Bay Shoal Bay Burnt Bay Indian Bay Friday Bay Gander Bay Lockers Bay Trinity Bay Deadman's Bay Notre Dame Bay Freshwater Bay Y Pond Ten Mile Pond Wing Pond Gull Pond Cooks Pond Square Pond Soulis Pond Gander Lake Rodney Pond Big Bear Cave Pond First Burnt Pond Limit of Study Area North Atlantic Ocean Bonavista Bay Fogo Gambo Gander Embree Benton Botwood Lumsden Horwood Glenwood Hare Bay Cobbs Arm Birchy Bay Greenspond Summerford Lewisporte Norris Arm Aspen Cove Carmanville Twillingate Campbellton Deadman's Bay New-Wes-Valley Change Islands Musgrave Harbour Point Leamington Moreton's Harbour Seldom-Little Seldom Centreville-Wareham-Trinity Joe Batt's Arm-Barr'd Islands-Shoal Bay 200 100 600 300 500 400 800 900 1000 1000 100 400 200 200 300 100 500 200 300 500 200 200 200 300 600 300 500 200 300 400 500 400 300 900 200 200 1000 500 400 900 200 300 400 400 200 200 900 100 200 200 900 300 200 200 200 200 300 300 200 300 300 400 200 200 100 300 300 300 400 200 200 300 100 300 500 200 500 800 53°0' 53°0' 53°15' 53°15' 53°30' 53°30' 53°45' 53°45' 54°0' 54°0' 54°15' 54°15' 54°30' 54°30' 54°45' 54°45' 55°0' 55°0' 55°15' 55°15' 50°15' 50°0' 50°0' 49°45' 49°45' 49°30' 49°30' 49°15' 49°15' 49°0' 49°0' 48°45' 48°45' Gander St. John's St. Anthony Corner Brook Stephenville Grand Falls- Windsor Channel- Port aux Basques NEWFOUNDLAND 12I 11P 02L 02F 11O 12B 12A 02E 02C 02D 12H 01M 52°W 52°W 54°W 54°W 56°W 56°W 58°W 58°W 60°W 60°W 51°N 51°N 50°N 50°N 49°N 49°N 48°N 48°N 47°N 47°N 0 5 10 15 20 25 Kilometres Elevation in feet above mean sea level. Contour interval approximately 100 feet 1:500,000 Surficial Geology -Liverman, D.G.E and Taylor, D.M 1990: Surficial geology of insular Newfoundland; preliminary version: Newfoundland Department of Mines and Energy, Geological Survey Branch Map 90-08 100 0 100 50 Kilometers SURFICIAL GEOLOGY Map No. Central Newfoundland 1b UNIT B UNIT A SYMBOLS Geological Boundary (assumed).............................................................................................. Esker ......................................................................................................................................... REFERENCE: Department of Environment and Conservation Department of Natural Resources Exposed Bedrock: exposed bedrock with little or no sediment or vegetation cover; patches of till and other surficial sediment present but rare; topography and relief variable, and bedrock controlled Concealed Bedrock: bedrock, mainly concealed by vegetation; patches of till, sand and gravel, and bog (commonly less than 1.5 m thick) and exposed bedrock are common, but form less than 50% of the unit Diamicton Veneer: thin (less than 1.5m) discontinuous sheet of diamicton (poorly sorted sediment containing grain sizes from clay to boulders) overlying bedrock; patches of exposed bedrock and thicker sediment cover common; diamicton generally contains from 20% to 90% matrix (sand size or finer), and 80% to 10% clasts (greater than sand size); matrices generally dominated by sand with less than 20% silt and clay; maximum clast sizes from 1 to 2 m diameter; but clasts mostly granules (0.2 to 0.4cmc diameter); relief and topography variable and bedrock controlled Ridged Diamicton: a blanket of diamicton, 1.5 to 20m thick, with a topography consisting of streamlined elongate ridges 1.5 to 20m high, and 0.2 to 500m long; diamicton is of similar composition to diamicton veneer; this unit was likely deposited under actively flowing ice, with the long axis of ridges either parallel or perpendicular to ice flow Hummocky Diamicton: a blanket of diamicton, 1.5 to 15m thick having irregular hummocky topography and relief of 2 to 10m; hummocks are mainly composed of diamicton, but some may contain poorly sorted sand and gravel; diamicton is of similar composition to diamicton veneer; bog is commonly found in low areas between hummocks; this unit was mainly deposited by ice disintegration and stagnation during deglaciation Diamicton Blanket: similar to diamicton veneer; any deposit greater than 1.5m thick; minor irregularities of the underlying units are masked but the major topographic form is still evident Glaciofluvial Gravel and Sand: poor to well sorted sand and gravel, 1.5 to 50m thick, having a diverse surface topography; gravel is pebble to cobble sized, and forms 50 to 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 outwash plains (plains with low relief, and a channeled surface, 3 to 20m thick, and up to 10km long) Marine clay, sand, gravel and diamicton: this unit consists of a wide range of sediment types, deposited in a marine or glaciomarine environment; moderate to well sorted gravel and sand, up to 50 m thick, found in marine terraces and raised beaches; well sorted silt and clay, up to 90m thick, are found in ice distal glaciomarine deposits 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 Fluvial: low relief plains with channeled surfaces close to modern rivers, consisting of moderate to well sorted gravel, sand, silt and clay, deposited in modern river systems Colluvium: a mixture of rock debris and unconsolidated sediment deposited by mass movement forming aprons at the base of steep slopes Bog: accumulations of degraded organic matter deposited in poorly drained low-lying areas AMEC Earth & Environmental A Division of AMEC Americas Ltd. Map to Accompany AMEC Report TF8312718 Map Publication Date 2012 Unit A - Till Deposits Well yields range from 2 litres per minute (L/min) to 136 L/min and averaged 29 L/min with a median value of 18 L/min. Well depths range from 9 metres (m) to 50 m and averaged 17 m. The available data indicate that on average, wells drilled within Unit A have moderate potential yield. Unit B - Sand and Gravel Deposits Well yields range from 4 L/min to 683 L/min and averaged 102 L/min with a median value of 50 L/min. Well depths range from 9 m to 49 m and averaged 23 m. The available data indicates that wells drilled within Unit B have a moderate to high potential yield. SURFICIAL HYDROSTRATIGRAPHIC UNITS
Transcript of Map No.1 SURFICIAL GEOLOGY - Newfoundland and Labrador · patches of till and other surficial...
Soulis Brook
Exploits River
Northwest
Gander R
iver
Dog Bay
Loon Bay
Hare Bay
Shoal Bay
Burnt
Bay
Indian Bay
Friday Bay
Gander Bay
Lockers Bay
Trinity Bay
Deadman's Bay
Notre Dame Bay
Freshwater Bay
Y Pond
Ten Mile Pond
Wing Pond
Gull Pond
Cooks Pond
North Pond
Square Pond
Soulis Pond
Gander Lake
Rodney Pond
Big Bear Cave Pond
First Burnt Pond
Limit
of S
tudy
Are
a
N o r t hA t l a n t i c
O c e a n
Bonavista Bay
Fogo
Gambo
Gander
Embree
Benton
Botwood
Lumsden
Horwood
Glenwood
Hare Bay
Cobbs Arm
Birchy Bay
Greenspond
Summerford
Lewisporte
Norris Arm
Aspen Cove
Carmanville
Twillingate
Campbellton
Deadman's Bay
New-Wes-Valley
Change Islands
Musgrave Harbour
Point Leamington
Moreton's Harbour
Seldom-Little Seldom
Centreville-Wareham-Trinity
Joe Batt's Arm-Barr'd Islands-Shoal Bay
200
100
600
300
500
400
800
900
1000
1000
100
400
200
200
300
100
500
200
300
500
200
200
200
300
600
300
500
200
300
400
500
400
300
900
200
200
1000
500
400
900
200
300
400
400
200
200
900
100
200
200
900
300
200
200
200
200
300
300
200
300
300
400
200
200
100
300
300
300
400
200
200
300
100
300
500
200
500
800
53°0'
53°0'
53°15'
53°15'
53°30'
53°30'
53°45'
53°45'
54°0'
54°0'
54°15'
54°15'
54°30'
54°30'
54°45'
54°45'
55°0'
55°0'
55°15'
55°15'50°15'
50°0'
50°0'
49°45'
49°45'
49°30'
49°30'
49°15'
49°15'
49°0'
49°0'
48°45'
48°45'
Gander
St. John's
St. Anthony
Corner Brook
Stephenville
Grand Falls-Windsor
Channel-Port aux Basques
NEWFOUNDLAND
12I
11P
02L
02F
11O
12B 12A
02E
02C02D
12H
01M
52°W
52°W
54°W
54°W
56°W
56°W
58°W
58°W
60°W
60°W
51°N51°N
50°N50°N
49°N49°N
48°N 48°N
47°N 47°N
0 5 10 15 20 25Kilometres
Elevation in feet above mean sea level. Contour interval approximately 100 feet
1:500,000 Surficial Geology -Liverman, D.G.E and Taylor, D.M 1990: Surficial geology of insular Newfoundland; preliminary version: Newfoundland Department of Mines and Energy, Geological Survey Branch Map 90-08
100 0 10050
Kilometers
SURFICIAL GEOLOGYMap No.
Central Newfoundland
1b
UNIT B
UNIT A
SYMBOLSGeological Boundary (assumed)..............................................................................................Esker.........................................................................................................................................
REFERENCE:
Department of Environment and ConservationDepartment of Natural Resources
Exposed Bedrock: exposed bedrock with little or no sediment or vegetation cover; patches of till and other surficial sediment present but rare; topography and relief variable, and bedrock controlled Concealed Bedrock: bedrock, mainly concealed by vegetation; patches of till, sand and gravel, and bog (commonly less than 1.5 m thick) and exposed bedrock are common, but form less than 50% of the unit Diamicton Veneer: thin (less than 1.5m) discontinuous sheet of diamicton (poorly sorted sediment containing grain sizes from clay to boulders) overlying bedrock; patches of exposed bedrock and thicker sediment cover common; diamicton generally contains from 20% to 90% matrix (sand size or finer), and 80% to 10% clasts (greater than sand size); matrices generally dominated by sand with less than 20% silt and clay; maximum clast sizes from 1 to 2 m diameter; but clasts mostly granules (0.2 to 0.4cmc diameter); relief and topography variable and bedrock controlled Ridged Diamicton: a blanket of diamicton, 1.5 to 20m thick, with a topography consisting of streamlined elongate ridges 1.5 to 20m high, and 0.2 to 500m long; diamicton is of similar composition to diamicton veneer; this unit was likely deposited under actively flowing ice, with the long axis of ridges either parallel or perpendicular to ice flow Hummocky Diamicton: a blanket of diamicton, 1.5 to 15m thick having irregular hummocky topography and relief of 2 to 10m; hummocks are mainly composed of diamicton, but some may contain poorly sorted sand and gravel; diamicton is of similar composition to diamicton veneer; bog is commonly found in low areas between hummocks; this unit was mainly deposited by ice disintegration and stagnation during deglaciation Diamicton Blanket: similar to diamicton veneer; any deposit greater than 1.5m thick; minor irregularities of the underlying units are masked but the major topographic form is still evident Glaciofluvial Gravel and Sand: poor to well sorted sand and gravel, 1.5 to 50m thick, having a diverse surface topography; gravel is pebble to cobble sized, and forms 50 to 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 outwash plains (plains with low relief, and a channeled surface, 3 to 20m thick, and up to 10km long) Marine clay, sand, gravel and diamicton: this unit consists of a wide range of sediment types, deposited in a marine or glaciomarine environment; moderate to well sorted gravel and sand, up to 50 m thick, found in marine terraces and raised beaches; well sorted silt and clay, up to 90m thick, are found in ice distal glaciomarine deposits 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 Fluvial: low relief plains with channeled surfaces close to modern rivers, consisting of moderate to well sorted gravel, sand, silt and clay, deposited in modern river systems Colluvium: a mixture of rock debris and unconsolidated sediment deposited by mass movement forming aprons at the base of steep slopes Bog: accumulations of degraded organic matter deposited in poorly drained low-lying areas
AMEC Earth & EnvironmentalA Division of AMEC Americas Ltd.Map to Accompany AMEC Report TF8312718
Map Publication Date 2012
Unit A - Till DepositsWell yields range from 2 litres per minute (L/min) to 136 L/min and averaged 29 L/minwith a median value of 18 L/min. Well depths range from 9 metres (m) to 50 m andaveraged 17 m. The available data indicate that on average, wells drilled within Unit Ahave moderate potential yield.
Unit B - Sand and Gravel DepositsWell yields range from 4 L/min to 683 L/min and averaged 102 L/min with a medianvalue of 50 L/min. Well depths range from 9 m to 49 m and averaged 23 m.The available data indicates that wells drilled within Unit B have a moderate to highpotential yield.
SURFICIAL HYDROSTRATIGRAPHIC UNITS
