USGS Secondary Hydrogeologic Regions
Map
Limit:
Items
| uri | primarylit | geologicpr | fid | type | subprovinc |
|---|---|---|---|---|---|
| https://geoconnex.us/ref/sec_hydrg_reg/S01 | Sedimentary | Cordilleran | 63 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S02 | Volcanic | Cordilleran | 64 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S04 | Crystalline | Cordilleran | 38 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S05 | Volcanic | Cordilleran | 27 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S06 | Volcanic | Cordilleran | 32 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S07 | Crystalline | Cordilleran | 25 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S08 | Sedimentary | Cordilleran | 12 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S09 | Crystalline | Cordilleran | 53 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S10 | Mixed | Cordilleran | 51 | NN | Western |
| https://geoconnex.us/ref/sec_hydrg_reg/S11 | Volcanic | Cordilleran | 48 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S12 | Mixed | Cordilleran | 7 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S13 | Mixed | Cordilleran | 4 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S14 | Sedimentary | Cordilleran | 18 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S15 | Sedimentary | Cordilleran | 67 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S16 | Volcanic | Cordilleran | 50 | NN | Intermountain |
| https://geoconnex.us/ref/sec_hydrg_reg/S17 | Crystalline | Cordilleran | 42 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S18 | Sedimentary | Cordilleran | 40 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S19 | Volcanic | Cordilleran | 41 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S20 | Sedimentary | Cordilleran | 39 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S21 | Crystalline | Cordilleran | 31 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S22 | Sedimentary | Cordilleran | 29 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S23 | Volcanic | Cordilleran | 30 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S24 | Crystalline | Cordilleran | 56 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S25 | Sedimentary | Cordilleran | 54 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S26 | Volcanic | Cordilleran | 55 | NN | Rocky Mountains |
| https://geoconnex.us/ref/sec_hydrg_reg/S27 | Crystalline | Central Interior | 6 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S28 | Sedimentary | Central Interior | 5 | YN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S29 | Sedimentary | Central Interior | 17 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S30 | Sedimentary | Central Interior | 62 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S31 | Sedimentary | Central Interior | 49 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S32 | Sedimentary | Central Interior | 13 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S33 | Sedimentary | Central Interior | 24 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S34 | Sedimentary | Central Interior | 23 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S35 | Sedimentary | Central Interior | 43 | YN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S36 | Sedimentary | Central Interior | 47 | YN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S37 | Crystalline | Central Interior | 46 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S38 | Sedimentary | Central Interior | 3 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S39 | Sedimentary | Central Interior | 60 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S40 | Sedimentary | Central Interior | 57 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S41 | Sedimentary | Central Interior | 59 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S42 | Sedimentary | Central Interior | 66 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S43 | Volcanic | Central Interior | 65 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S44 | Mixed | Central Interior | 26 | NN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S45 | Sedimentary | Central Interior | 14 | YN | Unglaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S46 | Sedimentary | Central Interior | 61 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S47 | Crystalline | Central Interior | 8 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S48 | Crystalline | Central Interior | 36 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S49 | Sedimentary | Central Interior | 35 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S50 | Sedimentary | Central Interior | 2 | YY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S51 | Sedimentary | Central Interior | 45 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S52 | Sedimentary | Central Interior | 22 | YY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S53 | Crystalline | Central Interior | 1 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S54 | Sedimentary | Central Interior | 33 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S55 | Sedimentary | Central Interior | 37 | NY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S56 | Sedimentary | Central Interior | 20 | YY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S57 | Sedimentary | Central Interior | 21 | YY | Glaciated |
| https://geoconnex.us/ref/sec_hydrg_reg/S58 | Crystalline | Appalachian | 11 | NY | Appalachian |
| https://geoconnex.us/ref/sec_hydrg_reg/S59 | Sedimentary | Appalachian | 10 | NY | Appalachian |
| https://geoconnex.us/ref/sec_hydrg_reg/S60 | Crystalline | Appalachian | 34 | NY | Appalachian |
| https://geoconnex.us/ref/sec_hydrg_reg/S61 | Crystalline | Appalachian | 9 | NY | Appalachian |
| https://geoconnex.us/ref/sec_hydrg_reg/S62 | Sedimentary | Appalachian | 68 | NN | Appalachian |
| https://geoconnex.us/ref/sec_hydrg_reg/S63 | Sedimentary | Appalachian | 44 | NN | Ouachita |
| https://geoconnex.us/ref/sec_hydrg_reg/S64 | Sedimentary | Coastal Plain | 58 | NN | Coastal Plain |
| https://geoconnex.us/ref/sec_hydrg_reg/S65 | Sedimentary | Coastal Plain | 28 | YN | Coastal Plain |
| https://geoconnex.us/ref/sec_hydrg_reg/S66 | Sedimentary | Coastal Plain | 19 | YN | Coastal Plain |
| https://geoconnex.us/ref/sec_hydrg_reg/S67 | Sedimentary | Coastal Plain | 52 | YN | Coastal Plain |
| https://geoconnex.us/ref/sec_hydrg_reg/S68 | Sedimentary | Coastal Plain | 16 | YN | Coastal Plain |
| https://geoconnex.us/ref/sec_hydrg_reg/S69 | Sedimentary | Coastal Plain | 15 | YN | Coastal Plain |