L13

Location   
36.565040, -94.353329 (Google Map)

Site name       
None
Type
Road cut

Age/Formation/Unit  (in stratigraphic order)

Mississippian / St. Joe
Mississippian/Boone

Features of interest

Long road cut along Little Sugar Creek with vertical section of 60+ ft and one cut back terrace.  Boone/St Joe contact with angular contact, local unconformity? Dark layered chert (Reed Springs facies) at base of Boone. Tripolite at top of exposure. Good geophysical access on terrace.
Lithology present

Limestone, white chert, tripolitic chert, layered dark chert
State/County    

AR / Benton County

Access         

West side of US71

Support material available

Photos (35 iPhone)

Site visit history

C. Liner 11/14/2012, 6/18/2013

Detail of section showing angular contact

Area in read box of previous figure with lateral squeeze to exaggerate dips. Left image is uninterpreted. Right figure shows St. Joe/Boone angular contact.  The opening angle between blue and red lines is 6.7 degrees.