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