Township for Douglas County area (2)
Faults, approximately located (3)
| Normal (known, approximated, & inferred) |
| Reverse (known,approximated, & inferred) |
| Not Defined (concealed, approximated, & inferred) |
Fault_Displacement (indicated downthrown side of fault) (4)
Douglas County Boundary (5)
Quaternary Units Undifferentied (6)
Alluvial Aquifer wells (8)
Elevation of bedrock contact base of the alluvium (feet, MSL) (9)
| 50 foot contour interval |
Alluvium (10)
Upper Dawson Aquifer wells (permit designation) (12)
Estimated groundwater flow direction in the Upper Dawson Aquifer (13)
Dawson Arkos base elevation (feet, MSL) (14)
| 500 ft contour, with control |
| 100 ft contour, with control |
Dawson Arkose intersecting alluvium (15)
Dawson Arkose extent (16)
| Dawson Arkose, outcrop |
| Dawson Arkose, concealed |
Dawson Arkose base depth (feet below ground) (17)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
Lower Dawson Aquifer wells (permit designation) (19)
Estimated groundwater flow direction in the Lower Dawson Aquifer (20)
D1 upper fan base elevation (feet, MSL) (21)
| 500 ft contour, with control |
| 100 ft contour, with control |
D1 upper fan intersecting alluvium (22)
D1 upper fan extent (23)
| D1 upper fan, outcrop |
| D1 upper fan, concealed |
D1 upper fan extentbase depth (feet below ground) (24)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
Denver Aquifer wells (permit designation) (26)
Estimated groundwater flow direction in the Denver Aquifer (27)
Denver Aquifer base elevation [DWR] (feet, MSL) (28)
| 500 ft contour, with control |
| 100 ft contour, with control |
D1 middle unit intersecting alluvium (29)
D1 middle unit extent (30)
| D1 middle unit, outcrop |
| D1 middle unit, concealed |
Denver Aquifer base depth (feet below ground) (31)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
| 2,000 - 3,500 |
Arapahoe_Aquifer_wells (permit designation) (33)
D1 lower fan base elevation (feet, MSL) (34)
| 500 ft contour, with control |
| 500 ft contour, dashed where inferred |
| 100 ft contour, with control |
| 100 ft contour, dashed where inferred |
Estimated groundwater flow direction in the Arapahoe Aquifer (35)
D1 lower fan intersecting alluvium (36)
D1 lower fan extent (37)
| D1 lower fan, outcrop |
| D1 lower fan, concealed |
D1 lower fan base depth (feet below ground) (38)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
| 2,000 - 2,500 |
| 2,500 - 3,000 |
| 3,000 - 3,500 |
Laramie Formation wells (40)
Laramie Fox Hills wells (41)
Estimated groundwater flow direction in the Laramie Fox Hills Aquifer (42)
Fox Hills Sandstone top elevation (feet, MSL) (43)
| 500 ft contour, with control |
| 500 ft contour, dashed where inferred |
| 100 ft contour, with control |
| 100 ft contour, dashed where inferred |
Laramie Fox Hills intersecting alluvium (44)
Laramie Fox Hills extent (45)
| Laramie Formation, outcrop |
| Laramie-Fox Hills, concealed |
| Fox Hills Sandstone, outcrop |
Fox Hills Sanstone top depth (feet below ground) (46)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
| 2,000 - 2,500 |
| 2,500 - 3,000 |
| 3,000 - 3,500 |
Niobrara Formation wells (48)
Pierre Shale wells (49)
Cretaceous marine shale unit intersecting alluvium (50)
Cretaceous marine shale (51)
| Pierre Shale, outcrop |
| Pierre Shale, concealed |
| Niobrara Formation, outcrop |
| Niobrara Formation, concealed |
| Benton Group, outcrop |
| Benton Group, concealed |
| Cretaceous marine shale unit, concealed and extending to depths over 3,500 feet |
Dakota Aquifer wells (53)
Estimated groundwater flow direction in the Dakota Aquifer (54)
Elevation of the Dakota Aquifer base (feet, MSL) (55)
| 500 ft contour, with control |
| 500 ft contour, dashed where inferred |
| 100 ft contour, with control |
| 100 ft contour, dashed where inferred |
Dakota aquifer intersecting alluvium (56)
Dakota Aquifer extent (57)
| Dakota Aquifer outcrop |
| Dakota Aquifer concealed, outcrop |
| Dakota Aquifer concealed, no outcrop |
Dakota Aquifer depth (feet below ground) (58)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
| 2,000 - 2,500 |
| 2,500 - 3,000 |
| 3,000 - 3,500 |
| > 3,500 |
Triassic-Jurassic unit wells (60)
Triassic-Jurassic unit extent (61)
| Morrison Formation, outcrop |
| Lykins Formation, outcrop |
| Triassic-Jurrasic , concealed |
Lyons-Fountain Aquifer wells (63)
Estimated groundwater flow direction in the Lyons-Fountain Aquifer (64)
Elevation of the Lyons-Fountain base (feet, MSL) (65)
| 500 foot contour interval, with control |
| 500 foot contour interval, dashed where inferred |
| 100 foot contour interval, with control |
| 100 foot contour interval, dashed where inferred |
Lyons-Fountain Aquifer extent (66)
| Lyons-Fountain Aquifer, outcrop |
| Lyons-Fountain Aquifer, concealed |
Lyons-Fountain Aquifer intersecting alluvium (67)
Depth of Lyons-Fountain Aquifer (feet below ground) (68)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 2,000 |
| 2,000 - 2,500 |
| 2,500 - 3,000 |
| 3,000 - 3,500 |
| > 3,500 |
Older Paleozoic unit wells (70)
Elevation of the Older Paleozoic unit base (feet, MSL) (71)
| 500 foot contour interval, dashed where inferred |
| 100 foot contour interval, dashed where inferred |
Estimated groundwater flow direction in the Older Paleozoic units (72)
Older Paleozoic unit extent (73)
| Older Paleozoic unit, outcrop |
| Older Paleozoic unit, concealed |
Older Paleozoic unit intersecting alluvium (74)
Depth of the Older Paleozoic unit (feet below ground) (75)
| < 500 |
| 500 - 1,000 |
| 1,000 - 1,500 |
| 1,500 - 3,500 |
Igneous rocks wells (77)
Matamorphic rocks wells (78)
Fractured Crystalline rock Aquifer extent (79)
| Mesoproterozoic igneous rocks, outcrop |
| Mesoproterozoic igneous rocks, concealed |
| Paleoproterozoic igneous rocks, outcrop |
| Paleoproterozoic igneous rocks, concealed |
| Paleoproterozoic metamorphic rocks, outcrop |
| Paleoproterozoic metamorphic rocks, concealed |
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