Lazy Bend Formation

Lazy Bend Formation
State Texas
Name Lazy Bend Formation
Geologic age Pennsylvanian; Des Moines Series
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Clastic > Sandstone (Bed)
Comments Exposed along Brazos R. and tributaries near Lazy Bend, Parker Co. Previously the Middle mbr. of Millsap Lake Fm. (G. Scott and J.M. Armstrong, unpub. rept. on Parker Co.) and now the lowest named unit in the Strawn Group (unnamed Penn. rocks about 75? ft make up the base of Strawn Group). Shale in part sandy or silty, local coal beds, sandstones, and unmapped limestone lentils betw. base of Kickapoo Falls Ls. up to base of Brannon Bridge Ls. Underlies Grindstone Creek Fm. (or member) and overlies Dickerson Fm. (or member). Meek Bend Ls. gray, bedding flaggy, thin to massive, marine megafossils, 12 ft thick. Dennis Bridge Ls. fine grained, gray to lt. brn, marine megafossils, 5 ft thick. Kickapoo Falls Ls. fine grained, thick to medium bedded, upper part nodular, lt. gray, marine magafossils and algae; 12 ft thick. Thickness of Lazy Bend Fm. 275 ft.
Stratigraphic units Strawn Group, Meek Bend Limestone,Dennis Bridge Limestone,Kickapoo Falls Limestone
References

Plummer, F.B., and Hornberger, J., Jr., 1936, Univ. Texas Bull. 3534, p. 16.

Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000.

NGMDB product
Counties Erath - Hood - Palo Pinto - Parker