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Full-Text Articles in Stratigraphy
Algal-Bryozoan Carbonate Buildups Within The Pitkin Limestone (Mississippian-Chesterian), Northwest Arkansas, Alex T. Warmath
Algal-Bryozoan Carbonate Buildups Within The Pitkin Limestone (Mississippian-Chesterian), Northwest Arkansas, Alex T. Warmath
Journal of the Arkansas Academy of Science
More than 14 biohermal buildups have been recognized within the Pitkin Limestone (Mississippian-Chesterian) in eastern Washington and western Madison Counties, northwest Arkansas. These buildups resemble previously described algal mounds in upper Pennsylvanian strata of the Midcontinent region, but differ in their faunal and floral constituents. The mounds are composed of calcilutite with variable amounts of spar and fossil allochemical grains. Associated flanking facies consist of mixed biosparite near the core, grading outward into oosparite. A few zones of shaly, poorly washed biomicrite containing rounded clasts bearing Archimedes fragments are interbedded with the flanking mixed biosparite facies. These clasts appear to …
Calico Rock Sandstone Member Of The Everton Formation (Ordovician), Northern Arkansas, Raymond W. Suhm
Calico Rock Sandstone Member Of The Everton Formation (Ordovician), Northern Arkansas, Raymond W. Suhm
Journal of the Arkansas Academy of Science
Surface and subsurface stratigraphic studies in northeastern Arkansas show the Calico Rock Sandstone (Middle Ordovician) to be a lobate sand body up to 200 ft thick. The environment of deposition is considered from a study of grain characteristics, ripple marks, subjacent and superjacent units and unpublished isopachous maps. The data indicate the Calico Rock Sandstone formed in a transgressing Everton sea as a barrier island and near shore sand complex. The quartz sand was derived from a northern source and was distributed by southwestward flowing longshore currents.
Biostratigraphic And Lithostratigraphic Analysis Of The Hindsville Limestone (Mississippian) In Northwestern Arkansas, Robert C. Grayson Jr.
Biostratigraphic And Lithostratigraphic Analysis Of The Hindsville Limestone (Mississippian) In Northwestern Arkansas, Robert C. Grayson Jr.
Journal of the Arkansas Academy of Science
Several lithofacies can be recognized within the Hindsville Limestone (Mississippian) in its type area near Hindsville, Madison County, Arkansas. Lithofacies are based on petrographic analysis of matrix and constituent particles, particularly ooliths and skeletal grains. Hindsville deposition began with skeletal calcilutite incorporating chert rubble from the underlying Boone Formation. Increasing energy produced a sequence of skeletal calcarenites and oolites, and the end of Hindsville deposition was marked by a return to impure skeletal calcilutite. Conodonts recovered from the Hindsville Limestone include species of Cavusgnathus and Gnathodus. On the basis of reported ranges of these elements, the Hindsville appears to correlate …
Stratigraphy And Sedimentary Structures Of A Middle Bloyd Fluvial Sandstone, Washington And Madison Counties, Arkansas, John M. Glenn
Stratigraphy And Sedimentary Structures Of A Middle Bloyd Fluvial Sandstone, Washington And Madison Counties, Arkansas, John M. Glenn
Journal of the Arkansas Academy of Science
A prominent quartz-pebble-bearing sandstone unit crops out at stream level along the East Fork of the White River in Madison County. Detailed geologic mapping indicates that the unit is stratigraphically positioned between the Brentwood and Dye Shale Members of the Bloyd Formation and is not the Greenland Member of the Winslow Fromation as previously supposed. Sedimentary textures and structures of the unit indicate that it was deposited by competent, unidirectional currents flowing in a southerly direction. These currents were related to a broad braided stream system.
Biostratigraphy Of The Morrow Group Of Northern Arkansas, James Harrison Quinn
Biostratigraphy Of The Morrow Group Of Northern Arkansas, James Harrison Quinn
Journal of the Arkansas Academy of Science
No abstract provided.
Biostratigraphy Of Peccary Cave, Newton County, Arkansas, Lee Carson Davis
Biostratigraphy Of Peccary Cave, Newton County, Arkansas, Lee Carson Davis
Journal of the Arkansas Academy of Science
No abstract provided.
Shale-Limestone Alteration In The Upper Portion Of The Fayetteville Formation Near Marshall, Arkansas, W. Bruce Saunders
Shale-Limestone Alteration In The Upper Portion Of The Fayetteville Formation Near Marshall, Arkansas, W. Bruce Saunders
Journal of the Arkansas Academy of Science
No abstract provided.
New Lentil In Upper Fayetteville Formation, John D. Taylor
New Lentil In Upper Fayetteville Formation, John D. Taylor
Journal of the Arkansas Academy of Science
No abstract provided.
Relationship Of Igneous Activity To Mineral Deposits In Arkansas, Charles G. Stone, Philip J. Sterling
Relationship Of Igneous Activity To Mineral Deposits In Arkansas, Charles G. Stone, Philip J. Sterling
Journal of the Arkansas Academy of Science
No abstract provided.
Hypogene Clay And Mica Minerals Associated With Fault Zones In The Ouachita Mountains-Arkoma Basin Area, Arkansas, Charles G. Stone
Hypogene Clay And Mica Minerals Associated With Fault Zones In The Ouachita Mountains-Arkoma Basin Area, Arkansas, Charles G. Stone
Journal of the Arkansas Academy of Science
No abstract provided.
Geology Along A Portion Of Highway 23, Madison County, Arkansas, J. A. Mcentire Iii
Geology Along A Portion Of Highway 23, Madison County, Arkansas, J. A. Mcentire Iii
Journal of the Arkansas Academy of Science
No abstract provided.
Shear And Tension Fracture Patterns Of Northwest Arkansas, John F. Gibbons
Shear And Tension Fracture Patterns Of Northwest Arkansas, John F. Gibbons
Journal of the Arkansas Academy of Science
No abstract provided.
Application Of Palynology To The Study Of Tertiary Rocks Of The Coastal Plain Of Arkansas, Eugene L. Jones
Application Of Palynology To The Study Of Tertiary Rocks Of The Coastal Plain Of Arkansas, Eugene L. Jones
Journal of the Arkansas Academy of Science
No abstract provided.