USGS Secondary Hydrogeologic Regions
Map
Limit:
Items
| id | fid | uri | SHR | PrimaryLit |
|---|---|---|---|---|
| S53 | 1 | https://geoconnex.us/ref/sec_hyd... | Adirondack Mountains | Crystalline |
| S50 | 2 | https://geoconnex.us/ref/sec_hyd... | Arches-glaciated | Sedimentary |
| S38 | 3 | https://geoconnex.us/ref/sec_hyd... | Arches-unglaciated | Sedimentary |
| S13 | 4 | https://geoconnex.us/ref/sec_hyd... | Basin and Range Highlands | Mixed |
| S28 | 5 | https://geoconnex.us/ref/sec_hyd... | Black Hills-S | Sedimentary |
| S27 | 6 | https://geoconnex.us/ref/sec_hyd... | Black Hills-X | Crystalline |
| S12 | 7 | https://geoconnex.us/ref/sec_hyd... | Blue Mountains | Mixed |
| S47 | 8 | https://geoconnex.us/ref/sec_hyd... | Canadian Shield | Crystalline |
| S61 | 9 | https://geoconnex.us/ref/sec_hyd... | Cape Cod and Islands | Crystalline |
| S59 | 10 | https://geoconnex.us/ref/sec_hyd... | Champlain-Hudson Valleys-S | Sedimentary |
| S58 | 11 | https://geoconnex.us/ref/sec_hyd... | Champlain-Hudson Valleys-X | Crystalline |
| S08 | 12 | https://geoconnex.us/ref/sec_hyd... | Coast Ranges | Sedimentary |
| S32 | 13 | https://geoconnex.us/ref/sec_hyd... | Eastern New Mexico | Sedimentary |
| S45 | 14 | https://geoconnex.us/ref/sec_hyd... | Edwards-Trinity KT | Sedimentary |
| S69 | 15 | https://geoconnex.us/ref/sec_hyd... | Florida-Q | Sedimentary |
| S68 | 16 | https://geoconnex.us/ref/sec_hyd... | Florida-T | Sedimentary |
| S29 | 17 | https://geoconnex.us/ref/sec_hyd... | Front Range | Sedimentary |
| S14 | 18 | https://geoconnex.us/ref/sec_hyd... | Grand Canyon | Sedimentary |
| S66 | 19 | https://geoconnex.us/ref/sec_hyd... | Gulf Coastal-T | Sedimentary |
| S56 | 20 | https://geoconnex.us/ref/sec_hyd... | IA-MO Pennsylvanian | Sedimentary |
| S57 | 21 | https://geoconnex.us/ref/sec_hyd... | Illinois Basin | Sedimentary |
| S52 | 22 | https://geoconnex.us/ref/sec_hyd... | Inner Michigan Basin | Sedimentary |
| S34 | 23 | https://geoconnex.us/ref/sec_hyd... | Interior Pennsylvanian | Sedimentary |
| S33 | 24 | https://geoconnex.us/ref/sec_hyd... | Interior Permian | Sedimentary |
| S07 | 25 | https://geoconnex.us/ref/sec_hyd... | Klamath Mountains | Crystalline |
| S44 | 26 | https://geoconnex.us/ref/sec_hyd... | Llano Uplift | Mixed |
| S05 | 27 | https://geoconnex.us/ref/sec_hyd... | Middle Cascade Mountains | Volcanic |
| S65 | 28 | https://geoconnex.us/ref/sec_hyd... | Mississippi Embayment-KT | Sedimentary |
| S22 | 29 | https://geoconnex.us/ref/sec_hyd... | Middle Rocky Mountains-S | Sedimentary |
| S23 | 30 | https://geoconnex.us/ref/sec_hyd... | Middle Rocky Mountains-V | Volcanic |
| S21 | 31 | https://geoconnex.us/ref/sec_hyd... | Middle Rocky Mountains-X | Crystalline |
| S06 | 32 | https://geoconnex.us/ref/sec_hyd... | Middle & Southern Cascade Mountains | Volcanic |
| S54 | 33 | https://geoconnex.us/ref/sec_hyd... | Northern Appalachian Basin-PZ | Sedimentary |
| S60 | 34 | https://geoconnex.us/ref/sec_hyd... | Northern Appalachian Mountains-X | Crystalline |
| S49 | 35 | https://geoconnex.us/ref/sec_hyd... | North Central Interior-PZ | Sedimentary |
| S48 | 36 | https://geoconnex.us/ref/sec_hyd... | North Central Interior-X | Crystalline |
| S55 | 37 | https://geoconnex.us/ref/sec_hyd... | NE-KS Permian-Pennsylvanian | Sedimentary |
| S04 | 38 | https://geoconnex.us/ref/sec_hyd... | Northern Cascade Mountains | Crystalline |
| S20 | 39 | https://geoconnex.us/ref/sec_hyd... | Northern Rocky Mountains-Q | Sedimentary |
| S18 | 40 | https://geoconnex.us/ref/sec_hyd... | Northern Rocky Mountains-S | Sedimentary |
| S19 | 41 | https://geoconnex.us/ref/sec_hyd... | Northern Rocky Mountains-V | Volcanic |
| S17 | 42 | https://geoconnex.us/ref/sec_hyd... | Northern Rocky Mountains-X | Crystalline |
| S35 | 43 | https://geoconnex.us/ref/sec_hyd... | OK Permian-Pennsylvanian | Sedimentary |
| S63 | 44 | https://geoconnex.us/ref/sec_hyd... | Ouachita Mountains | Sedimentary |
| S51 | 45 | https://geoconnex.us/ref/sec_hyd... | Outer Michigan Basin | Sedimentary |
| S37 | 46 | https://geoconnex.us/ref/sec_hyd... | Ozarks-X | Crystalline |
| S36 | 47 | https://geoconnex.us/ref/sec_hyd... | Ozarks Paleozoic | Sedimentary |
| S11 | 48 | https://geoconnex.us/ref/sec_hyd... | Pacific Northwest Volcanics | Volcanic |
| S31 | 49 | https://geoconnex.us/ref/sec_hyd... | Raton Basin | Sedimentary |
| S16 | 50 | https://geoconnex.us/ref/sec_hyd... | Rio Grande Highlands | Volcanic |
| S10 | 51 | https://geoconnex.us/ref/sec_hyd... | Southern California Mountains | Mixed |
| S67 | 52 | https://geoconnex.us/ref/sec_hyd... | Southeast Coastal Plain-T | Sedimentary |
| S09 | 53 | https://geoconnex.us/ref/sec_hyd... | Sierra Nevada | Crystalline |
| S25 | 54 | https://geoconnex.us/ref/sec_hyd... | Southern Rocky Mountains-S | Sedimentary |
| S26 | 55 | https://geoconnex.us/ref/sec_hyd... | Southern Rocky Mountains-V | Volcanic |
| S24 | 56 | https://geoconnex.us/ref/sec_hyd... | Southern Rocky Mountains-X | Crystalline |
| S40 | 57 | https://geoconnex.us/ref/sec_hyd... | Texas-Cretaceous | Sedimentary |
| S64 | 58 | https://geoconnex.us/ref/sec_hyd... | Texas-KT | Sedimentary |
| S41 | 59 | https://geoconnex.us/ref/sec_hyd... | Texas-Pennsylvanian | Sedimentary |
| S39 | 60 | https://geoconnex.us/ref/sec_hyd... | Texas-Triassic | Sedimentary |
| S46 | 61 | https://geoconnex.us/ref/sec_hyd... | Upper Cretaceous, glaciated | Sedimentary |
| S30 | 62 | https://geoconnex.us/ref/sec_hyd... | Upper Cretaceous, unglaciated | Sedimentary |
| S01 | 63 | https://geoconnex.us/ref/sec_hyd... | Washington Oregon Coast Ranges-S | Sedimentary |
| S02 | 64 | https://geoconnex.us/ref/sec_hyd... | Washington Oregon Coast Ranges-V | Volcanic |
| S43 | 65 | https://geoconnex.us/ref/sec_hyd... | West Texas-V | Volcanic |
| S42 | 66 | https://geoconnex.us/ref/sec_hyd... | West Texas-S | Sedimentary |
| S15 | 67 | https://geoconnex.us/ref/sec_hyd... | xColorado Plateau | Sedimentary |
| S62 | 68 | https://geoconnex.us/ref/sec_hyd... | xValley&Ridge | Sedimentary |