Cross section by T.M. Stanley.
modern channels and flood plains. Thickness: 0 to about 30 ft.
derived sediment; consisting exclusively of fine- to medium-grained quartz sand, clay, and some silt.
Top of unit is about 40 ft to 60 ft above modern flood plain deposits; area rarely subject to flooding.
Thickness: 0 ft to over 60 ft.
plains. Thickness: 0 ft to at least 40 ft.
northeast wind direction throughout the Holocene. Thickness: 0 ft to as much as 140 ft.
shale interval varies between 15 ft to 30 ft thick, averaging about 21 ft thick.
with each bed separated by a shale parting.
interval occurring below the Dodds Creek Sandstone.
bivalves. Thin calcite veins (~ 1 cm wide), are present in some exposures.
Thickness a consistent 3 ft.
concretionary, silty clayshales, mudshales and siltstones.
appear pitted due to the weathering out of burrow filling.
Total thickness of the Seminole Formation about 130 ft.
Thickness of the Lost Branch about 110 ft.
quad. It represents the top of the formation.
ft, depending on thickness of overlying Jenks Sandstone.
plates are the most dominant fossil, bryozoans, brachiopods, and bivalves also occur.
Thickness of the Eleventh Street Limestone no more than 3 ft, and usually less than a foot thick.
sandstone; nodular, hematite concretions common.
intervals may attain a thickness of 10 ft or more between individual limestone beds.
Only the uppermost 150 ft of the formation is exposed in the Jenks quad.
carbonate mudstone to wackestone; found only in the subsurface.
Verdigris and Tiawah Limestones; found only in the subsurface.
prominant sandstone members, the Taft Sandstone and the Bluejacket Sandstone at the base.
Formation also includes the Inola Limestone; found only in the subsurface.
mudstones; found only in the subsurface.
Tulsa Geological Society Digest, 37, 1 sheet, scale 1:63,360.
adjacent counties): Oklahoma Geological Survey Bulletin, 69, 234 p.
based on fresh surfaces, unless stated otherwise.