GEOLEX

Summary of Citation: Aaron

Publication:
Laney, F.B., 1917, The geology and ore deposits of the Virgilina
   district of Virginia and North Carolina: Virginia Geological
   Survey Bulletin, no. 14, 176 p.

Usage in Publication:
Aaron slate

Modifications:	Geologic Province:	Dominant Lithology:
Named	Piedmont-Blue Ridge province	Slate

Summary:
Slate-like rock formed by mixtures of varying amounts of andesitic volcanic ash and ordinary land waste, which through pressure and other agents of metamorphism have been changed or altered into a kind of hybrid slate, in some places into a schist. Varies from nearly pure greenstone to fairly pure argillaceous sandstone and slate, and term "slate" was applied to it only after much hesitation and many vain attempts to find a better name. In field work called "sandy tuff." Immediately overlies Hyco quartz porphyry. Well exposed at many places along Aaron's Creek, Person and Granville Cos., NC. Assigned to Ordovician(?).

Summary of Citation: Aaron

Publication:
Kreisa, R.D., 1980, Geology of the Omega, South Boston, Cluster
   Springs, and Virgilina quadrangles: Virginia Division of
   Mineral Resources Publication, no. 5, 22 p.

Usage in Publication:
Aaron Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Piedmont-Blue Ridge province

Summary:
Name of unit changed from Aaron Slate to Aaron Formation. Informally subdivided into lower slate member (914 m), middle mafic metavolcanic member (762 m), and upper slate member (no thickness given). Conformably overlies Hyco Formation. Age given as Precambrian(?).

Summary of Citation: Aaron

Publication:
Harris, C.W. and Glover, Lynn, III, 1988, The regional extent
   of the ca. 600-Ma Virgilina deformation; implications for
   stratigraphic correlation in the Carolina terrane: Geological
   Society of America Bulletin, v. 100, no. 2, p. 200-217

Usage in Publication:
Aaron Formation

Modifications:	Geologic Province:	Dominant Lithology:
Redescribed Revised Age modified	Piedmont-Blue Ridge province	Conglomerate

Summary:
Aaron Formation is distinctive stratigraphic marker of quartz arenite pebbles and cobbles. Middle and upper members of Aaron as defined by Kreisa (1980) are here assigned to Virgilina Formation, while Aaron is restricted to lower sedimentary member. Interpreted as deep-water, submarine fan, derived from erosion of underlying Hyco Formation. Unconformably underlies Virgilina Formation to the north and Uwharrie Formation to the south. Intruded by Roxboro metagranite (575+/-20 Ma) and Parks Crossroads granodiorite (566+/-46 Na). Age is late Precambrian and Early Cambrian(?) [all maps show Aaron as late Precambrian only].

Summary of Citation: Aaron

Publication:
Rader, E.K. and Evans, N.H., 1993, Geologic map of Virginia;
   expanded explanation: Virginia Division of Mineral Resources,
   80 p.

Usage in Publication:
Aaron slate

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Piedmont-Blue Ridge province

Summary:
Aaron herein includes the upper and lower members of the Aaron Formation of Kreisa (1980), and the Aaron Formation and upper portion of the Virgilina Formation of Harris and Glover (1985). Unit is subdivided into two map units. Upper phyllite and slate is very-light-gray, fine-grained, bedded volcaniclastic sediments, conglomerate, lithic feldspathic arenite, micaceous sandstone, siltstone, phyllite, argillite, and vitric tuff, with minor greenstone. Grayish-green slate interbedded with light-gray to grayish-green micaceous metasandstone occurs at base of this upper part. Bedding is conspicuous and graded bedding is common. Lower map unit (metaconglomerate) is metamorphosed sandy conglomerate, conglomeratic sandstone, and granule conglomerate containing pebbles and cobbles of polycrystalline quartz, with lesser diorite, diabase, chert, rhyolite, granite, schist, and quartz arenite. Cobbles are generally less than 2 cm but may range up to 25 cm in diameter.

Summary of Citation: Aaron

Publication:
Lesure, F.G., 1993, Reconnaissance geochemistry in the southern
   part of the Virgilina district, North Carolina and Virginia:
   U.S. Geological Survey Miscellaneous Field Studies Map,
   MF-2203, 1 sheet, scale

Usage in Publication:
Aaron Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Piedmont-Blue Ridge province

Summary:
Aaron Formation is used in accordance with Harris and Glover (1988). Consists of thin beds of quartz-pebble conglomerate, fine-grained volcanic sandstone and siltstone, minor amounts of pyroclastic beds now altered to slate, metasandstone, metaconglomerate, and minor amounts of greenstone. Age is Late Proterozoic (following maps in Harris and Glover (1988) which show Aaron as late Precambrian only).