Historic_Quarry_Drill_Hole_and_Sample_Locations (1)
| drill hole |
| other (no data available) |
| quarry |
| sample site |
| sand/gravel pit |
Landform_Unit_Classification (2)
| A - alluvial fan |
| E - eolian sand (wind deposited) |
| F - floodplain deposit |
| M - man-made deposits (slag, tailings, spoils, etc.) |
| O - other, includes conglomerates |
| R - potential quarry aggregate resource |
| T - stream terrace deposit |
| U - upland deposits |
| V - valley fill (floodplain and/or terrace deposits) |
| Z - not mapped |
Resource_Classification (3)
| 0 - originally unlabeled/unknown |
|
| 1 - gravel: relatively clean and sound, coarse aggregate (at least 30% retained on no. 4 screen, visual estimation) |
| 2 - gravel: significant fines, decomposed rock, calcium carbonate, coarse aggregate (at least 30% retained on no. 4 screen, visual estimation) |
| 3 - sand, fine aggregate (greater than 70% passing no. 4 screen, 60% retained on no. 200 screen, visual estimation) |
| 4 - unevaluated resource, probable aggregate resource |
| 5 - carbonate rocks |
| 6 - volcanic rocks |
| 7 - intrusive igneous rocks |
| 8 - metamorphic rocks (including quartzite) |
| 9 - other |
Boundaries (4)
| definite contact, known/observed (solid) |
| inferred, buried (dotted) contact |
| approximate (dashed) contact |
|
| neatline (used for delineation of resource areas that end at a county boundary) |
| unattributed line, used for clarification of textual notes |
Plate1.tif (6)
| Red: Band_1 |
|
| Green: Band_2 |
|
| Blue: Band_3 |
Plate2.tif (7)
|
| Red: Band_1 |
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| Green: Band_2 |
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| Blue: Band_3 |
Plate3.tif (8)
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| Red: Band_1 |
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| Green: Band_2 |
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| Blue: Band_3 |
Colorado_River_Valley_Sand_Gravel_Resources (10)
| Category 1 - High Potential |
| Category 1a - High Potential, overlain by +5 feet of loess |
| Category 2 - Good Potential |
| Category 3 - Moderate Potential |
| Category 3a - Moderate Potential, overlain by +5 feet of loess |
| Category 4 - Low Potential |
| Category 4a - Low Potential, overlain by +5 feet of loess |
Sample_Locations (11)
County_Streams (12)
2001_active_gravel_permits (13)
2001_ all_permits (14)
All_Pre1981_mines (18)
sand_gravel_borrow (19)
sandstone (20)
silica_sand (21)
volcanics (22)
clay_shale (23)
crushed_rock (24)
decomposed_granite (25)
dolomite (26)
limestone (27)
perlite (28)
CSM_Historic_Industiral_Minerals.tif (30)
| Red: Band_1 |
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| Green: Band_2 |
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| Blue: Band_3 |
County_ Boundaries_DOLA (32)
| Mapped |
| Other |
Municipal_Boundaries_DOLA (33)
Developed_Areas_NLCD (34)
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24K_Quadrangle_Boundaries_CGS (35)
| 1974 Study Area Quadrangle Boundary |
|
| Other Quad Boundaries |
State_Border_DOLA (36)
State_Land_Board_Mineral_Ownership (38)
Land_Ownership_BLM (39)
| Bureau of Land Management |
| Bureau of Reclamation |
| Colorado Department of Wildlife |
| US Forest Service |
| US Fish and Wildlife |
| National Park Service |
| Private |
| State |
| Other |
Streams (40)
Lakes (41)
|
