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Rockford Limestone over Maury Shale (Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3

Rockford Limestone over Maury Shale (Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3

Dolostone in the Mississippian of Kentucky, USA. (geology hammer for scale)

This is the Rockford Limestone, a relatively thin interval of dolostone. Very weathered surfaces are yellowish-brown to brown in color. Fresh, crack surfaces are light to medium gray in color. At this site, the Rockford has silicified fossils (e.g., crinoid stems).

The overlying gray shales are part of the Fort Payne Formation. The underlying unit is the Maury Shale.

Stratigraphy: Rockford Limestone, lower Osagean, Lower Mississippian

Locality: roadcut on the northern side of Route 90, just west of Burkesville, central Cumberland County, southern Kentucky, USA (36° 48’ 01.98” North latitude, 85° 22’ 48.93” West longitude)

(plus d'infos...)

Photo prise le 13 mars 2018 (© James St. John / Flickr)

Voir aussi :
 rockford, limestone, mississippian, burkesville, kentucky, dolostone
 

Photos Kentucky