Blackburn, Ohio

The same ground, surveyed 77 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1907 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.

• 1907 USGS Lancaster quadrangle1:62500
• 1909 USGS Lancaster quadrangle1:62500
• 1909 USGS Lancaster quadrangle1:62500
• 1947 USGS Columbus quadrangle1:250000
• 1961 USGS Clearport quadrangle1:24000
• 1961 USGS Clearport quadrangle1:24000
• 1961 USGS Clearport quadrangle1:24000
• 1961 USGS Clearport quadrangle1:24000
• 1961 USGS Columbus quadrangle1:250000
• 1962 USGS Columbus quadrangle1:250000
• 1967 USGS Columbus quadrangle1:250000
• 1967 USGS Columbus quadrangle1:250000
• 1984 USGS Lancaster quadrangle1:100000

The federal wildfire occurrence database lists 17 fires within 5 miles of Blackburn (historical) between 2013 and 2020, burning about 34 acres in total. None started naturally. 1 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.

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:

• Buena Vista
• Mound Crossing
• South Perry
• Rockhouse (historical)
• Laurelville
• Gibisonville

Every fire recorded in Hocking County

Museums hold 3,474 specimens collected within 10 miles of Blackburn (historical) between 1839 and 1975: 2,234 Animalia, 663 Plantae, 542 Fungi, 15 Protozoa, 11 Bacteria, 9 Unrecorded. 12 distinct Species records are shown. Collected by ?, A VERWYST, A. L. Welden 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
	Aecidium galii Pers.	1883	Kellerman, W.A.	Amanda
	Diderma spumarioides (Fr. & Palmquist) Fr., 1829	1890	Detmers, Freda	Sugar Grove
	Coleosporium solidaginis (Schwein.) Thüm.	1891	M. Craig	Sugar Grove
	Coreopsis discoidea Torr. & A.Gray	1839	W. S. Sullivant
	Platanthera leucophaea (Nutt.) Lindl.	1839	W. S. Sullivant
	Saxifraga sullivantii Torr. & A.Gray	1839	W. S. Sullivant
	Trillium erectum var. declinatum A.Gray	1839	W. S. Sullivant
	Ricciocarpos natans (L.) Corda	1840	W. S. Sullivant
	Rudbeckia sullivantii C.L.Boynton & Beadle	1840	W. S. Sullivant
	Amblystegium serpens var. juratzkanum (Schimp.) Rau & Herv.	1841	not recorded
	Hamatocaulis vernicosus (Mitt.) Hedenäs	1841	W. S. Sullivant
	Ceratodon purpureus (Hedw.) Brid.	1842	W. S. Sullivant

All 3,474 specimens within 10 miles, at the Global Biodiversity Information Facility.

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 1067394. 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.

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.