Grey Rocks, California

The same ground, surveyed 68 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1925 1993

Matched 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.

• 1925 USGS Rocky Hill quadrangle1:31680
• 1927 USGS Rocky Hill quadrangle1:31680, 3 printings
• 1948 USGS Fresno quadrangle1:250000
• 1951 USGS Rocky Hill quadrangle1:24000, 5 printings
• 1952 USGS Exeter quadrangle1:62500, 2 printings
• 1955 USGS Fresno quadrangle1:250000
• 1956 USGS Fresno quadrangle1:250000
• 1958 USGS Fresno quadrangle1:250000
• 1960 USGS Fresno quadrangle1:250000, 2 printings
• 1962 USGS Fresno quadrangle1:250000, 3 printings
• 1966 USGS Fresno quadrangle1:250000
• 1993 USGS Visalia quadrangle1:100000, 2 printings

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 401 fires within 5 miles of Grey Rocks (historical) between 1992 and 2020, burning about 3,386 acres in total. 1 started naturally. 170 were 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.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Burr
• Sides (historical)
• Cairns Corner
• Hawkins (historical)
• Lindsay
• Lucca

Every fire recorded in Tulare County

Regional context, not property-specific evidence. The federal mineral resources record lists 28 workings within 5 miles of Grey Rocks (historical): 16 past producers, 8 prospects, 4 occurrences. None of them still produces. What was taken out: Chromium, Magnesite, Manganese, Copper. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Tulare County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

This settlement is recorded in the Geographic Names Information System as feature 1661895. 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.