Tarkio Limestone | |
---|---|
Stratigraphic range: [1] (Virgilian stage) [2] | |
![]() Slumped blocks of Tarkio Limestone tumbling into Deep Creek below
Pillsbury Crossing in
Riley County, Kansas | |
Type | Member |
Unit of | Zeandale Limestone of Wabaunsee Group |
Underlies | Wamego Shale member of Zeandale Limestone |
Overlies | Willard Shale |
Lithology | |
Primary | Limestone |
Location | |
Region | Kansas |
Country | United States |
Type section | |
Named for | Outcrops in the Tarkio Valley in northwestern Missouri |
Named by | G.E. Condra [2] |
Year defined | 1935 |
The Tarkio Limestone, is a Late-Carboniferous member of the Zeandale Formation in Kansas, extending into Nebraska, Iowa, and Missouri. [2] [1] The unit was named for outcrops in the Tarkio Valley in northwestern Missouri, however, R.C. Moore designated a typical exposure of this unit on Mill Creek, southwest of Maple Hill, Kansas. [3] Owing to its unusual coloration, an early name for this rock was chocolate limestone. [2] This rock can be recognized by its coloration and abundant fusulinids, Triticites ventricosus, protruding from the surfaces, giving a "raspy" texture. [4]
The Tarkio Limestone forms bold bluffs along Deep Creek in southeastern Riley County, Kansas and can be easily accessed there at Pillsbury Crossing, [3] about 30 miles (48 km) west of Maple Hill.
Distribution'--The Tarkio limestone forms a bench and bold cliff on each side of Deep Creek southeast of Zeandale and is exposed along the east-west road in sec. 29, T. 10 S., R. 9 E.; along the north-south road in the southeast part of the same section; along the cliff that crosses secs. 27, 28 and 33, T. 10 S., R. 9 E.; at Pillsbury's Crossing, ...
Very robust fusulinids, Triticites ventricosus, stand out on weathered surfaces and impart a rasp-like appearance. Where best exposed the limestone is seen to consist of two beds, each approximately 6 feet thick.
Tarkio Limestone | |
---|---|
Stratigraphic range: [1] (Virgilian stage) [2] | |
![]() Slumped blocks of Tarkio Limestone tumbling into Deep Creek below
Pillsbury Crossing in
Riley County, Kansas | |
Type | Member |
Unit of | Zeandale Limestone of Wabaunsee Group |
Underlies | Wamego Shale member of Zeandale Limestone |
Overlies | Willard Shale |
Lithology | |
Primary | Limestone |
Location | |
Region | Kansas |
Country | United States |
Type section | |
Named for | Outcrops in the Tarkio Valley in northwestern Missouri |
Named by | G.E. Condra [2] |
Year defined | 1935 |
The Tarkio Limestone, is a Late-Carboniferous member of the Zeandale Formation in Kansas, extending into Nebraska, Iowa, and Missouri. [2] [1] The unit was named for outcrops in the Tarkio Valley in northwestern Missouri, however, R.C. Moore designated a typical exposure of this unit on Mill Creek, southwest of Maple Hill, Kansas. [3] Owing to its unusual coloration, an early name for this rock was chocolate limestone. [2] This rock can be recognized by its coloration and abundant fusulinids, Triticites ventricosus, protruding from the surfaces, giving a "raspy" texture. [4]
The Tarkio Limestone forms bold bluffs along Deep Creek in southeastern Riley County, Kansas and can be easily accessed there at Pillsbury Crossing, [3] about 30 miles (48 km) west of Maple Hill.
Distribution'--The Tarkio limestone forms a bench and bold cliff on each side of Deep Creek southeast of Zeandale and is exposed along the east-west road in sec. 29, T. 10 S., R. 9 E.; along the north-south road in the southeast part of the same section; along the cliff that crosses secs. 27, 28 and 33, T. 10 S., R. 9 E.; at Pillsbury's Crossing, ...
Very robust fusulinids, Triticites ventricosus, stand out on weathered surfaces and impart a rasp-like appearance. Where best exposed the limestone is seen to consist of two beds, each approximately 6 feet thick.