Hidden Lakes, Ohio

The same ground, surveyed 81 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1913 1994

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.

• 1913 USGS Mount Gilead quadrangle1:62500
• 1916 USGS Mount Gilead quadrangle1:62500
• 1943 USGS Mount Gilead quadrangle1:62500
• 1950 USGS Marion quadrangle1:250000
• 1961 USGS Mount Gilead quadrangle1:24000
• 1961 USGS Mount Gilead quadrangle1:24000
• 1961 USGS Mount Gilead quadrangle1:24000
• 1962 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1986 USGS Mansfield quadrangle1:100000
• 1994 USGS Mansfield quadrangle1:100000

Museums hold 377 specimens collected within 10 miles of Hidden Lakes between 1837 and 1975: 355 Animalia, 14 Fungi, 7 Plantae, 1 Unrecorded. 12 distinct Species records are shown. Collected by A. P. Morgan, Adler, K. K., Bird, C. 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
	Hypoxylon albocinctum Ellis & Everh.	1890	A. P. Morgan	Preston
	Ustilago nuda (C.N.Jensen) Kellerm. & Swingle	1890	Kofoid
	Sphacelotheca hydropiperis (Schumach.) de Bary	1891	Kofoid
	Sagittaria latifolia Willd.	1837	Frank B
	Sicyos angulatus P.J.Bergius	1837	Frank B	in civitatate Ohio
	Usnea florida (L.) F.H.Wigg.	1837	not recorded
	Ascochyta Lib., 1830	1883	Kellerman
	Nummularia microplaca (Berk. & M.A.Curtis) Cooke	1883	W.A. Kellerman
	Septoria ribis (Lib.) Desm.	1883	W. A. Kellermann
	Uromyces (Link) Unger, 1833	1883	Kellerman
	Empidonax traillii (Audubon, 1828)	1893	Roberts	unspecified
	Dispira cornuta Tiegh.	1895	R. Thaxter

All 377 specimens within 10 miles, at the Global Biodiversity Information Facility.

The federal mineral resources record lists 2 workings within 5 miles of Hidden Lakes: 2 producers. All of them still produce. What was taken out: Phosphorus-Phosphates, Sand and Gravel, Construction. 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 Morrow 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 2805295. 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.