USGS loc. 14983 (Carboniferous of the United States)

Also known as Colln. E779

Where: Shasta County, California (40.8° N, 122.3° W: paleocoordinates 2.4° N, 53.8° W)

• outcrop-level geographic resolution

When: Baird Formation, Mississippian (358.9 - 323.2 Ma)

• The contact between the Baird and the underlying Bragdon Fm. can be seen at the upper limit of the platy shale. This may be a disconformity, but it is difficult to tell. The thickness of the Baird is also unknow due to faulting and poor outcrops.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; black, green, cherty/siliceous mudstone and limestone

• The stratigraphy of this area suggests that volcanism was dominant during the early and late Baird. Marine sedimentation was dominant the remainder of the time. This environment was probably a sea dotted with volcanoes.
• The Baird Fm, consists mainly of pyroclastic rocks interbedded with tuffaceous sandstone, mudstone, and mafic flows in the lower part; sliaceous mudstone and minor amounts of limestone, chert, and tuff in the middle part; and greenstone in the upper part. The formation is intruded in many places by tabular bodies of mafic quartz diorite. The pyroclastic rocks are mostly greenish-gray to greenish-black volcanic breccia, tuff breccia, and tuff. The tuffaceous sandstone forms beds 10ft. thick and is interlayered with tuff and mudstone. Mudstone comprises 25-30% of the rocks in the Baird Fm., it forms in beds 4-12inches thick. About 50% of the limestone in the outcrop has been replaced by chert

Size class: macrofossils

Primary reference: J. P. Albers and J. F. Robertson. 1961. Geology and Ore Deposits of East Shasta Copper-Zinc District Shasta County, California. United States Geological Survey Professional Paper 338:1-107 [T. Olszewski/M. Gibson/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 10241: authorized by Tom Olszewski, entered by Melissa Gibson on 15.03.2001, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Also included in the list are crinoid columnals, bellerophontid gastropod, genus indet., pleurotomarian gastropod, genus indet., pseudozygopleurid gastropod, genus indet., murchisonid ? gastropod, genus indet., ostracods, genus indet.
Show authors, comments, and common names
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
"ostracodes, genus indet."
Chileata
 Dictyonellida - Isogrammidae
Isogramma cf. pachti
Rhynchonellata
 Spiriferida - Elythidae
? Torynifer sp.
 Spiriferida - Spiriferidae
Spirifer sp., Spirifer cf. brazerianus
Spirifer sp. Sowerby 1818
Strophomenata
 Orthotetida - Orthotetidae
Orthotetes sp.
 Strophomenida - Chonetidae
Chonetes sp.
Chonetes sp. Fischer de Waldheim 1830
 Productida - Productellidae
"Productus" aff. keokuk
 Productida - Productidae
"Dictyoclostus cf. scabriculoides" = Buxtonia scabriculoides
"Dictyoclostus cf. scabriculoides" = Buxtonia scabriculoides Paeckelmann 1931
 Productida - Linoproductidae
"Cancrinella" cf. undata, ? Linoproductus sp.
 Productida - Echinoconchidae
Echinoconchus aff. punctatus
Lingulata
 Lingulida - Discinidae
Orbiculoidea aff. damanensis
Orbiculoidea aff. damanensis Sarycheva and Sokolskaja 1952
Stenolaemata
 Rhabdomesida - Rhabdomesidae
Rhabdomeson sp.
 Cryptostomata - Septoporidae
"Thamniscus" sp.
"Thamniscus" sp. King 1849
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839
 Cryptostomata - Acanthocladiidae
Polypora sp.
Gastropoda
 Murchisoniina -
Murchisoniina indet.
Murchisoniina indet. Cox and Knight 1960 snail
"murchisonid (?) gastropod, genus indet.
 Euomphalina - Euomphalidae
Straparollus (Straparollus) sp.
Straparollus (Straparollus) sp. de Montfort 1810 snail
 Zygopleuroidea - Pseudozygopleuridae
Pseudozygopleuridae indet.
Pseudozygopleuridae indet. Knight 1930 snail
"Pseudozygopleurid gastropod, genus indet."
 Bellerophontida -
Bellerophontida indet.
Bellerophontida indet. Ulrich and Scofield 1897 snail
"bellerophontid gastropod, genus indet."
 Pleurotomariida -
"Pleurotomariina indet." = Pleurotomariida
"Pleurotomariina indet." = Pleurotomariida Cox and Knight 1960 snail
"pluerotomarian gastropod, genus indet."
Bivalvia
 Trigoniida - Schizodidae
Schizodus sp.
Schizodus sp. King 1844 clam
 Pectinida -
Pectinoidea indet.
Pectinoidea indet. Rafinesque 1815 scallop
"? Amusium sp."
 Pectinida - Aviculopectinidae
"Aviculipecten aff. fimbriatus" = Aviculopecten, "Aviculipecten dissimilis" = Aviculopecten, "Aviculipecten sp." = Aviculopecten
"Aviculipecten aff. fimbriatus" = Aviculopecten scallop
"Aviculipecten dissimilis" = Aviculopecten scallop
"Aviculipecten sp." = Aviculopecten M'Coy 1851 scallop
 Ostreida - Pterineidae
? Pteronites sp.
? Pteronites sp. McCoy 1842 oyster
 Ostreida - Pinnidae
Pinnidae indet.
Pinnidae indet. Leach 1819 oyster
"? Pinna sp."
 Arcida - Parallelodontidae
Parallelodon cingulatus, Parallelodon verneuilianus, Parallelodon sp., "Parallelodon aff. reticulatus" = Parallelodon qinghaiensis
Parallelodon sp. Meek and Worthen 1866 clam
"Parallelodon aff. reticulatus" = Parallelodon qinghaiensis Liu 1976 clam
Cephalopoda
 Pseudorthocerida - Pseudorthoceratidae
"? Mooreoceras sp." = Pseudorthoceras
"? Mooreoceras sp." = Pseudorthoceras Girty 1912
Anthozoa
 Stauriida - Lithostrotionidae
Lithostrotion aff. pauciradiale