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