When is chester rocks

The Cypress-Golconda contact is transitional, with a shale zone between the top sandstone of the Cypress and the lowest limestone of the Golconda in many localities. This zone is in most places non-calcareous and even sandy and might well be called Cypress rather than Golconda as has been done in this paper. The Golconda, feet thick, consists of interbedded limestones and shales without lithologic zones which are persistent throughout the district.

The Barlow sand which occurs in places in the northern and eastern parts of the district is consistently near the middle of the formation. The Hardinsburg is a quartz sandstone with variable amounts of shale and ranges in thickness from 68 to about feet.

The shales occur in different parts of the sections in different localities but in general are in the middle and upper parts. It is thickest in the southeastern part of the district. The Glen Dean consists of interbedded shales and limestones much like the Golconda but generally with purer limestones than other Chester formations. It is feet thick; the greatest thickness is in the south-central part of the district.

Considerably less information about the upper Chester has been obtained by drilling. The Tar Springs consists of interbedded sandstone and shale feet thick. The Vienna limestone and shale vary from 30 to feet in thickness. The Waltersburg, feet, consists of sandstone and shale; the shale is most conspicuous in the middle part of the formation.

The Menard, feet thick where drilled, consists of interbedded limestones and shales, which do not occur as persistent zones. Complete sections of the higher Chester formations have not been drilled. It is concluded that many of the clastic Chester sediments are of continental origin and that the marine parts of the section were deposited in relatively shallow water. Shibboleth Sign In. OpenAthens Sign In. Institutional Sign In. Sign In or Create an Account. User Tools.

Sign In. Advanced Search. Skip Nav Destination Article Navigation. Close mobile search navigation Article navigation. Volume 36, Number 9. Previous Article Next Article. Article Navigation. Research Article September 01, Sutton ; A. Google Scholar. Oesterling W. AAPG Bulletin 36 9 : — Article history first online:.

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