PBDB Collection

Mines in Coleraine-Bovey vicinity: Turonian, Minnesota

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

unclassified

	Vertebrata indet. Lamarck 1801
	shark and other fish teeth, reptile teeth
Polychaeta - Sabellida - Serpulidae

	Serpula bicarinata
	n. sp.
Cephalopoda - Ammonitida - Acanthoceratidae

	Metrioceras aff. swallovi
	originally entered as "Metioceras aff. swallovi"
	= Metoicoceras bergquisti Cobban 1983	Cobban 1983
	= Metoicoceras aff. swallovi Shumard 1859	Wright et al. 1996
	Incorrectly corrected. Metrioceras is early Paleozoic nautiloid
	= Metoicoceras bergquisti Cobban 1983	Mertz 2017
Cephalopoda - Ammonitida - Engonoceratidae

	Epengonoceras cf. dumblei
	synonym of Metengonoceras
	originally entered as "Epengonoceras cf. dumblei"
Bivalvia - Pholadomyida - Pholadomyidae

	Pholadomya coloradensis
Bivalvia - Cardiida - Mactridae

	Cymbophora ? utahensis
	originally entered as "Cymbophora ? utahensis"
Bivalvia - Mytilida - Mytilidae

	Brachidontes arcturusensis
	n. sp.
Bivalvia - Ostreida - Gryphaeidae

	Exogyra boveyensis
	n. sp.

	Exogyra lamellosa
	n. sp.

	Exogyra mesabiensis
	n. sp.

	Exogyra suborbiculata
Bivalvia - Ostreida - Ostreidae

	Ostrea gilei
	n. sp.

	Ostrea prudentia

	Ostrea staufferi
	(Alectryonia) n. sp.

	Ostrea congesta Conrad 1843
Bivalvia - Ostreida - Bakevelliidae

	Gervillia ? propleura
	originally entered as "Gervillia ? propleura"
Bivalvia - Myalinida - Inoceramidae

	Inoceramus fragilis Hall and Meek 1856
unclassified

	Crustacea indet. Brünnich 1772
	invalid subgroup of Pancrustacea
	crustacean fragments
see common names

Geography

Time

Period:	Cretaceous	Epoch:	Late/Upper Cretaceous
Stage:	Turonian	10 m.y. bin:	Cretaceous 6
*Epoch:	Gallic
Key time interval:	Turonian
Age range of interval:	93.90000 - 89.80000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Coleraine
Stratigraphic resolution:	formation
Stratigraphy comments: "On the basis of the fauna [the fm.] is considered the age equivalent of the lower Benton in the Colorado series." TURONIAN info from R.E. Sloan (1964) The Cret. Syst. in MN; Minn. Geol. Surv. Rept. Invest. 5

Lithology and environment

Primary lithology:	green poorly lithified "shale"
Secondary lithology:	conglomerate
Environment:	marine indet.	Tectonic setting:	cratonic basin
Geology comments: "Shale containing oyster beds once extended over nearly the entire Hill Walker pit and continued eastward into the western part of the Morrision pit. In the Canisteo pit...the basal conglomerate bore pebbles of quartz, iron formation, and highly altered igneous and metamorphic rock, all firmly cemented This graded through a few inches of a red-green, fine pebble conglomerate into a few feet of massive lean ore." Bovey- "About a foot of coarse conglomerate occured at the base; the pebbles were composed of the underlying iron-ore formation, some being highly polished pieces of hematite and limonite in a greenish iron-clay matrix. OVer this congl was about 8 ft of greenish iron-clay with concretions of the same material. No fossils were ever found in the concretions. Along the W side of the pit about 6 inches of fine pebble congl in a gritty green matrix was overlain by 5-7 ft of green to red soft fine lean ore."

Taphonomy

Modes of preservation:

body

Collection methods and comments

Collection excludes:	some macrofossils
Collection methods:	surface (in situ),mechanical,field collection,survey of museum collection
Reason for describing collection:	taxonomic analysis
Collection method comments: "During a 12 month period in 1937 and 1938 the writer studied in detail the Mesabi invertebrate fossil collection at the University of Minnesota...Good fossil specimens were difficult to find during the field season of 1937 when the writer visited the region."
Taxonomic list comments:"No attempt was made to identify any vertebrate material such as shark and reptile teeth and vertebrae, which are rather plentiful. The plant life has likewise been neglected..."

Metadata

Reference information

Primary reference:

H. R. Bergquist. 1944. Cretaceous of the Mesabi Iron Range, Minnesota. Journal of Paleontology 18(1):1-30 [J. Alroy/M. Sommers/J. Alroy]

Secondary references:

29572		W. A. Cobban. 1983. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior. United States Geological Survey Professional Paper 1253:1-25 [A. Hendy/A. Hendy/A. Hendy]
68446		D. A. A. Mertz. 2017. Phylogeny, diversity, and ecology of the ammonoid superfamily Acanthoceratoidea through the Cenomanian and Turonian. 1-111 [P. Wagner/P. Wagner/D. Mertz]
28273		C. W. Wright, J. H. Calloman, and M. K. Howarth. 1996. Cretaceous Ammonoidea. Treatise on Invertebrate Paleontology L(4):1-362 [A. Hendy/A. Hendy]