BlockShamrock, California
20 topographic sheets cover this place, the earliest surveyed in 1944 and the latest in 1992. It stands in the Calipatria-Westmorland census division. It lies in ZIP code area 92233. The Survey maps it on the Westmorland East quadrangle. It lies 197 feet below sea level. The federal gazetteer marks this settlement historical: it is no longer a populated place, though the surveys that recorded it still are.
Then and now
1944 to 1992The same ground, surveyed 48 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.
Topographic sheets covering this place
10 surveys from 20 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1944 USGS Calipatria quadrangle1:62500, 4 printings
- 1954 USGS Salton Sea quadrangle1:250000
- 1955 USGS Salton Sea quadrangle1:250000, 2 printings
- 1956 USGS Westmorland quadrangle1:24000, 3 printings
- 1959 USGS Salton Sea quadrangle1:250000, 4 printings
- 1963 USGS Salton Sea quadrangle1:250000
- 1965 USGS Salton Sea quadrangle1:250000
- 1976 USGS Calipatria quadrangle1:50000
- 1985 USGS Salton Sea quadrangle1:100000, 2 printings
- 1992 USGS Westmorland East quadrangle1:24000
Fires near this place
5 since 1997Regional context, not property-specific evidence. The federal wildfire occurrence database lists 5 fires within 5 miles of Shamrock (historical) between 1997 and 2013, burning about 71 acres in total. None started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 4 |
| Power generation/transmission/distribution | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 20 August 2011 | Missing data/not specified/undetermined | 35 acres | Sonny Bono Salton Sea National Wildlife Refuge | ALAMO |
| 30 July 1997 | Missing data/not specified/undetermined | 10 acres | Sonny Bono Salton Sea National Wildlife Refuge | SCHRIMPF |
| 11 July 2013 | Power generation/transmission/distribution | under an acre | Sonny Bono Salton Sea National Wildlife Refuge | SONNY |
| 30 April 2001 | Missing data/not specified/undetermined | 25 acres | Sonny Bono Salton Sea National Wildlife Refuge | BARRISTER |
| 30 April 1997 | Missing data/not specified/undetermined | under an acre | Sonny Bono Salton Sea National Wildlife Refuge | SPOT |
Settlements close enough to share some of these fires:
Mines and quarries near this place
4 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 4 workings within 5 miles of Shamrock (historical): 1 producer, 1 occurrence, 1 plant, 1 past producer. 2 still produce. What was taken out: Sand and Gravel, Construction, Pumice, Potassium, Salt, Strontium, Zinc, Barium-Barite, Lithium, Iron, Manganese. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Bolsa Pit | Sand and Gravel, Construction | Producer | ||
| Rock Hill Deposit | Pumice | Occurrence | Pumice | |
| Salton Sea KGRA | Potassium, Salt, Strontium, Zinc, Barium-Barite, Lithium, Iron, Manganese | Plant | 1927 | |
| Sinclair No. 3 | Boron-Borates, Lead, Lithium, Chlorine, Copper, Silver, Zinc | Past Producer |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Verdant | 1.1 miles | 20 | |
| Fondo | 2.4 miles | 20 | |
| Calipatria | 3.5 miles | 22 | |
| Bernice (historical) | 3.8 miles | 20 | |
| Estelle | 5.5 miles | 22 | |
| Rockwood | 6.0 miles | 20 | |
| Westmorland | 6.0 miles | 20 | |
| Mayflower (historical) | 7.6 miles | 21 |
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikidata item Q7487632 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1701714. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.