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Bloyd Formation
The
Bloyd
Formation
, or
Bloyd
Shale
, is a
geologic formation
in
Arkansas
. It
preserves
fossils
dating
back to the
Carboniferous period
.
Stratigraphy
The Bloyd Formation
conformably
overlies the
Hale Formation
and
unconformably
underlies the
Atoka Formation
. Five formal and one
informal
members are recognized in the Bloyd Formation :
Kessler
Limestone
Member
Dye Shale Member
Parthenon
Sandstone
Member
Woolsey Member
Baldwin
coal
Brentwood Limestone Member
In the
eastern
parts of the Ozarks in Arkansas, the Bloyd Formation becomes
undifferentiated
with the
underlying
Hale
Formation and is called the
Witts Springs Formation
.
Paleontology
[Brachiopod
]s
Anthracospirifer
Antiquatonia
Hustedia
Linoproductus
Orthotetes
Rhynchopora
Tesuquea
[Bryozoa
]ns
Anisotrypa
Coscinotrypa
Fenestella
Fistulipora
Glyptopora
Lyropora
Matheropora
Polypora
Phyllopora
Prismopora
Rhombopora
Septopora
Sulcoretepora
Tabulipora
[Cephalopod
]s
Axinolobus
Bisatoceras
Boesites
Branneroceras
Cancelloceras
Cymoceras
Diaboloceras
Euloxoceras
Gaitherites
Gastrioceras
Glaphyrites
Homoceratoides
Liroceras
Metadimorphoceras
Mooreoceras
Perigrammoceras
Phaneroceras
Proshumardites
Pseudoparalegoceras
Pseudopronorites
Pseudorthoceras
Pygmaeoceras
Solenochilus
Stearoceras
Stenopronorites
Syngastrioceras
Verneuilites
Wiedeyoceras
[Conodont
]s
Adetognathus
Hibbardella
Idiognathodus
Idiognathoides
Ligonodina
Metalonchodina
Neognathodus
Neoprioniodus
Spathognathodus
Streptognathodus
[Crinoid
]s
Affinocrinus
Alcimocrinus
Allocatillocrinus
Anchicrinus
Anobasicrinus
Arkacrinus
Atokacrinus
Calycocrinus
Cibolocrinus
Cromyocrinus
Dicromyocrinus
Diphuicrinus
Endelocrinus
Globacrocrinus
Lassanocrinus
Lecythiocrinus
Megaliocrinus
Metacromyocrinus
Metautharocrinus
Morrowocrinus
Palmerocrinus
Paracromyocrinus
Paradelocrinus
Paragassizocrinus
Paramphicrinus
Perimestocrinus
Phacelocrinus
Planacrocrinus
Platyacrocrinus
Platycrinites
Sciadiocrinus
Scytalocrinus
Stenopecrinus
Stereobrachicrinus
Strongylocrinus
Ulrichicrinus
[Flora
]
Archaeolithophyllum
Cuneiphycus
Donezella
Eflugelia
Girvanella
Paraepimastopora
Stachedoides
[Foraminifera
]
Ammodiscus
Ammovertella
Archaediscus
Asteroarchaediscus
Biseriella
Calcitornella
Climacammina
Diplospahaerina
Endothyra
Endothyranella
Eolasiodiscus
Eosigmoilina
Eostafella
Hemigordius
Millerella
Monotaxinoides
Neoarchaediscus
Palaeonubecularia
Paramillerella
Planoendothyra
Plectogyra
Pseudoglomospira
Tetrataxis
Trepeilopsis
Tuberatina
Turrispiroides
[Ostracod
]s
Amphissites
Bairdiolites
Hollinella
Kegelites
Kirkbya
Pseudoparaparchites
[Sponge
]s
Haplistion
Steioderma
Virgaspongia
Trace Fossils
">Trace fossil">Trace Fossils
Conostichus
[Incertae sedis
]
Asphaltina
Clacisphaera
Nostocites
Osagia
Proninella