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National Geologic Map Database

Geologic Unit: Middle Granville

Usage:

No current usage.
(†Middle Granville Slate (NY), †Middle Granville Formation (NY), or †Middle Granville Slate of Mount Hamilton Group (VT) considered abandoned.)


Geologic age:

Early Cambrian


Type section, locality, area and/or origin of name:

Type section: [along NY State Hwy 22A,] in quarries and adjacent outcrops 300 to 1,500 m north-northwest of the bridge over the Mettawee River at Middle Granville, [Granville 7.5-min quadrangle, Washington Co., eastern NY] (Kidd and others, IN Fisher, 1984).
Reference sections (Kidd and others, IN Fisher, 1984):
(1) non-working quarry 2 mi N. 24 deg. E. of bridge over Mettawee River at Truthville, west side of Holcombville Road, [approx. Lat. 43 deg. 28 min. 48 sec. N., Long. 73 deg. 18 min. 29 sec. W., Granville 7.5-min quadrangle, Washington Co., eastern NY], [= stop 2] of Rowley and others (1979);
(2) on northern side of hill [620 ft elevation] in field btw. Holcombville Road and nearby southeastern shore of Browns Pond (3.15 mi N. 13 deg. E. of bridge over Mettawee River at Truthville), [approx. Lat. 43 deg. 29 min. 48 sec. N., Long. 73 deg. 18 min. 39 sec. W., Granville 7.5-min quadrangle, Washington Co., eastern NY];
(3) where 800-ft contour crosses Hills Pond Road, about 0.3 mi north of Hills Pond, [approx. Lat. 43 deg. 31 min. 13 sec. N., Long. 73 deg. 16 min. 52 sec. W., Thorn Hill 7.5-min quadrangle, Washington Co., eastern NY]; and
(4) outcrop belt [2+/- mi west of Granville] in fields along west side of Lee Road, [approx. Lat. 43 deg. 24 min. 12 min. N., Long. 73 deg. 17 min. 40 sec. W., Granville 7.5-min quadrangle, Washington Co., eastern NY].


AAPG geologic province:

New England province


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).