Blacklick Ridge, Ohio

The same ground, surveyed 59 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1925 1984

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 East Columbus quadrangle1:62500
• 1925 USGS East Columbus quadrangle1:62500
• 1925 USGS East Columbus quadrangle1:62500
• 1943 USGS East Columbus quadrangle1:62500
• 1947 USGS Columbus quadrangle1:250000
• 1955 USGS Reynoldsburg quadrangle1:24000
• 1961 USGS Columbus quadrangle1:250000
• 1962 USGS Columbus quadrangle1:250000
• 1964 USGS Reynoldsburg quadrangle1:24000
• 1964 USGS Reynoldsburg quadrangle1:24000
• 1964 USGS Reynoldsburg quadrangle1:24000
• 1964 USGS Reynoldsburg quadrangle1:24000
• 1964 USGS Reynoldsburg quadrangle1:24000
• 1967 USGS Columbus quadrangle1:250000
• 1967 USGS Columbus quadrangle1:250000
• 1984 USGS Lancaster quadrangle1:100000

The county history of 1858 has no passage naming this settlement, which was common for the smaller places. Its township is covered in full.

Museums hold 2,209 specimens collected within 10 miles of Blacklick Ridge between 1840 and 1975: 1,944 Animalia, 170 Plantae, 76 Fungi, 16 Chromista, 3 Unrecorded. 12 distinct Species records are shown. Collected by A. J. Basinger, A. P. Morgan, Almon J. Basinger and others. Each is a physical object with a catalogue number, and each entry opens the museum's record. This is what was collected and kept, not a survey of what lives here - nothing can be concluded from a species being absent.

Image	Species	Year	Collected by	Where, as recorded
	Sorghum bicolor (L.) Moench	1900	Jennings, O.E.	Columbus, Ohio.
	Ceratodon purpureus (Hedw.) Brid.	1840	W. S. Sullivant	Columbus
	Podophyllum peltatum L.	1840	Sullivant, W.S.
	Amblystegium varium (Hedw.) Lindb.	1842	W. S. Sullivant	Columbus
	Anoectangium ciliatum (Hedw.) Schwägr.	1842	Sullivant, W.S.	Columbus
	Anomodon rostratus (Hedw.) Schimp.	1842	W. S. Sullivant	Columbus
	Archidium ohioense Schimp. ex Müll.Hal.	1842	W. S. Sullivant	Columbus
	Astomum muhlenbergianum (Sw.) Grout	1842	W. S. Sullivant	Columbus
	Atrichum undulatum (Hedw.) P.Beauv.	1842	W. S. Sullivant	Columbus
	Aulacomnium heterostichum (Hedw.) Bruch & Schimp.	1842	W. S. Sullivant	Columbus
	Ameiurus melas (Rafinesque, 1820)	1897	R. Osburn & E. Williamson	Masons Run, Franklin County, Ohio
	Ameiurus natalis (Lesueur, 1819)	1897	R. Osburn & E. Williamson	Alum Creek, Franklin County, Ohio

All 2,209 specimens within 10 miles, at the Global Biodiversity Information Facility.

The federal mineral resources record lists 4 workings within 5 miles of Blacklick Ridge: 3 past producers, 1 producer. 1 still produces. What was taken out: Sand and Gravel, Construction, Clay. 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 Franklin 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 2771183. 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.

Specimens. Global Biodiversity Information Facility (GBIF), https://www.gbif.org/. Only records licensed CC0 or CC BY are used. Records licensed CC BY-NC are excluded because this site carries advertising. Images are checked individually and any whose licence is non-commercial, no-derivatives or unreadable is refused.

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.