Archer, California

The same ground, surveyed 43 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1942 1985

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.

• 1942 USGS Amboy quadrangle1:250000
• 1943 USGS Amboy quadrangle1:250000
• 1943 USGS Cadiz Lake quadrangle1:62500
• 1954 USGS Needles quadrangle1:250000
• 1956 USGS Cadiz Lake quadrangle1:62500, 2 printings
• 1956 USGS Needles quadrangle1:250000, 7 printings
• 1981 USGS Needles quadrangle1:250000
• 1985 USGS Cadiz Lake NE quadrangle1:24000
• 1985 USGS Sheep Hole Mountains quadrangle1:100000

Regional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of Archer: 3 prospects. None of them still produces. What was taken out: Chromium, Sodium, Hafnium, Sodium, Thorium. 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 San Bernardino County

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

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.

This settlement is recorded in the Geographic Names Information System as feature 1660262. 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.

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.