Frey, Robert W., Howard, James D. (1990) Trace fossils and depositional sequences in a clastic shelf setting, Upper Cretaceous of Utah. Journal of Paleontology, 64 (5) 803-820 doi:10.1017/s0022336000019004
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Trace fossils and depositional sequences in a clastic shelf setting, Upper Cretaceous of Utah | ||
| Journal | Journal of Paleontology | ||
| Authors | Frey, Robert W. | Author | |
| Howard, James D. | Author | ||
| Year | 1990 (September) | Volume | 64 |
| Issue | 5 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0022336000019004Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 415049 | Long-form Identifier | mindat:1:5:415049:1 |
| GUID | 0 | ||
| Full Reference | Frey, Robert W., Howard, James D. (1990) Trace fossils and depositional sequences in a clastic shelf setting, Upper Cretaceous of Utah. Journal of Paleontology, 64 (5) 803-820 doi:10.1017/s0022336000019004 | ||
| Plain Text | Frey, Robert W., Howard, James D. (1990) Trace fossils and depositional sequences in a clastic shelf setting, Upper Cretaceous of Utah. Journal of Paleontology, 64 (5) 803-820 doi:10.1017/s0022336000019004 | ||
| In | (1990, September) Journal of Paleontology Vol. 64 (5) Cambridge University Press (CUP) | ||
| Abstract/Notes | In Coal Creek Canyon, Utah, the Spring Canyon Member of the Blackhawk Formation is divisible into four regressive hemicycles of deposition, each representing the downdip part of a nearshore-to-offshore sequence. The first and fourth hemicycles are best developed. Individual bedding units span middle-shoreface to lower-offshore lithofacies, the latter corresponding to a thin intertongue of Mancos Shale.Trace fossil assemblages include ~22 ichnospecies and 17 ichnogenera: Ancorichnus, Aulichnites, Chondrites, Cylindrichnus, Ophiomorpha, Palaeophycus, Phoebichnus, Planolites, Rosselia, Schaubcylindrichnus, Scolicia, Skolithos, Taenidium, Teichichnus, Terebellina, Thalassinoides, and Uchirites. Diversity and abundance of ichnospecies are greater in nearshore than in offshore lithofacies. Distal deposits are typified by obscure bioturbate textures: Cylindrichnus concentricus, Palaeophycus heberti, and Rosselia socialis are prevalent through the remainder of the lithofacies suite. Ophiomorpha irregulaire and Schaubcylindrichnus coronus are most common in middle-shoreface beds and Chondrites ichnosp. in upper-offshore beds; Ophiomorpha nodosa and O. annulata also are common in this part of the sequence. | ||
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