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- Chiques [Chickies] Rock
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- Original reference
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Lesley, J.P., 1876, Historical sketch of geological explorations in Pennsylvania and other states, with an appendix containing the annual reports of the State Geologist to the Board of Commisioners: Pennsylvania Geological Survey Report of Progress, 2nd series, v. A, 226 p.
Summary:
Pg. 60. Chiques [Chickies] Rock, in Susquehanna River above Columbia, [Columbia West 7.5-min quadrangle, Lancaster County, southeastern Pennsylvania], may not be Potsdam sandstone in northern New York and at Bethlehem and Allentown. If Chiques Rock be not Potsdam, why then it remains simply Chiques. [Age is Early Cambrian.]
[Additional locality information from USGS historical topographic map collection TopoView, accessed March 18, 2014.]
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
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- Chicques quartzite
- Chickies quartzite
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- Areal extent
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- Piedmont-Blue Ridge province
Summary:
J.P. Lesley, 1877 (2nd Pennsylvania Geol. Survey Rpt. C2, on York, Adams, and other counties, index). "Chiques (or Chickies) quartzite, page 202." [Page 202 describes the section at Wrightsville, York County, southeastern Pennsylvania, and states that "a very thick bed of quartzite underlies the slates and schists of the Wrightsville section (Chicques rock, etc.)."]
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
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- Chikis [Chickies] quartzite
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- Areal extent
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- Piedmont-Blue Ridge province
Summary:
Pg. 6-8, 19-20, 108. Chikis quartzite. The quartzite of Chikis rock [Chickies Rock, Lancaster County, southeastern Pennsylvania] is representative of Primal sandstone of Rogers. Is found in large mass only on northern half of composite hills known as "Chikis." The quartzite and quartz slate which belong with it do not extend more than 115 paces (say 100 meters or yards) from the first bold, bare escarpment back of Prof. Haldeman's house to the point where the quartzite character appears to give pace upwards to the somewhat chloritic hyrdomica schists so often spoke of. As a rule the schists which underlie the Chikis quartzite are much more chloritic than those which overlie it. The quartzite of Chikis rock can be followed out into and across the river, and it plays a part in the long ridge on the York County side. Chikis Ridge consists in the main of a quartzite replaced in portions by quartz slate and chloritic schists.
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
- Usage in publication:
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- Chikis [Chickies] quartzite
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- Areal extent
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- Piedmont-Blue Ridge province
Summary:
Chikis [Chickies] quartzite (Potsdam?). [Shown as older than hydromica schists and argillites and younger than Peach Bottom roofing slates.]
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
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- Chikis [Chickies] quartzite
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- Areal extent
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- Piedmont-Blue Ridge province
Summary:
Chikis quartzite (Potsdam?). [Shown as younger than Peach Bottom roofing slate and older than Lower calcareous slates, hydromica schists, and argillites.]
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
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- Chikis [Chickies] quartzite
- Hellam quartzite
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- Areal extent
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- Piedmont-Blue Ridge province
Frazer, Persifor, Jr., 1886, Sketch on the geology of York County, Pennsylvania: American Philosophical Society Proceedings, v. 23, no. 123, p. 391-410.
Summary:
Pg. 346, 398-400. Hellam quartzite, Cambric. Same as Potsdam sandstone and Formation No. 1. The base of the Paleozoic. A part of it composed Chikis Mountain. Contains SCOLITHUS [SKOLITHOS] LINEARIS. The Hellam or Chikis quartzite is a hard quartzose rock, generally white or gray, tinted by some other color, usually pink, brown, or blue. Is almost always crystalline. In Chester County, [southeastern Pennsylvania], it lies unconformably on Archean schists.
Source: US geologic names lexicon (USGS Bull. 896, p. 427-428).
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- Chickies quartzite*
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- Overview
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- Piedmont-Blue Ridge province
Summary:
Chickies quartzite in Philadelphia area is massive quartzite with Hellam conglomerate member at base and quartz schist in upper part. Unconformably overlies Precambrian Wissahickon mica gneiss; underlies Shenandoah limestone.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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- Chickies Quartzite
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- Overview
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- Piedmont-Blue Ridge province
Summary:
Chickies Quartzite of the Chilhowee Group. Usage of Pennsylvania Geological Survey. Overlies Late Proterozoic gneiss; underlies Harpers Formation or Harpers and Antietam Formations, undivided. Hellam Conglomerate Member at base. Age is Late Proterozoic and Early Cambrian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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- Chickies Quartzite*
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- Age modified
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Chickies Quartzite and Hellam Member in lower part are of Early Cambrian age. Unconformably and abruptly overlies a wide variety of Proterozoic gneisses, including Octoraro Phyllite. Underlies Antietam Quartzite and Harpers Phyllite undivided.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).