Foraminifera source details
Peterson, R.H.; Gauger, D.J. & Lankford, R.R. (1953). Microfossils of the Upper Cretaceous of northeastern Utah and southwestern Wyoming. Utah Geological and Mineralogical Survey. Bulletin. 47(Contributions in Micropaleontology 1):1-158.
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Peterson, R.H.; Gauger, D.J. & Lankford, R.R.
1953
Microfossils of the Upper Cretaceous of northeastern Utah and southwestern Wyoming
Utah Geological and Mineralogical Survey. Bulletin
47(Contributions in Micropaleontology 1):1-158
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Microfossils obtained from three upper Cretaceous formations in northeastern Utah and southwestern Wyoming indicate both marine and non-marine facies within the units. The formations studied include the Frontier Formation, the Hilliard, and the "Wanship" (Henefer of Eardley). Evidence from the microfaunas and microfloras suggests that the Hilliard and Frontier are dominantly marine where sampled, and that the Wanship fossiliferous zones are dominantly non-marine, or marginal to marine facies. On the basis of the present studies, the following conclusions are drawn concerning the ages of the three
formations: 1. In general, the marine fossils bear a closer affinity to upper Cretaceous forms of the Gulf Coast than to other formations of similar age in the Rocky Mountain region. 2. The Foraminifera and Ostracoda of the Frontier Formation in the Coalville, Utah, region suggest that it is in part equivalent to the upper Eagle Ford-lower Austin (Turonian-Senonian) of the
Texas Gulf Coast Section. 3. The abundant Foraminifera and Ostracoda of the Hilliard correlate in general with the Taylor
of the Gulf Coast, although there are many species of Austin age. This suggests that the Colorado-Montana (Austin-Taylor) boundary lies within the lower portion of the Hilliard. 4. The microfauna and microflora of the "Wanship" Formation, dominantly non-marine, are similar to non-marine Upper Cretaceous forms of other areas. However, marine species found in the formation have been described elsewhere from the Paleocene and Eocene.
America, North
Systematics, Taxonomy
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Bigenerina elongata Gauger, 1953 † (original description)
Dentalina coalvillensis Peterson, 1953 † (original description)
Dentalina frontierensis Peterson, 1953 † (original description)
Dentalina summitensis Peterson, 1953 † (original description)
Dentalina utahensis Peterson, 1953 † (original description)
Eouvigerina inflata Gauger, 1953 † (original description)
Haplophragmoides inflata Gauger, 1953 † (original description)
Haplophragmoides rugosa Gauger, 1953 † (original description)
Marginulina austinana var. wasatchensis Peterson, 1953 † (original description)
Marssonella conica Gauger, 1953 † (original description)
Planularia inflata Gauger, 1953 † (original description)
Spiroplectammina dentata var. tenuisa Gauger, 1953 † (original description)
Textularia inflata Gauger, 1953 † (original description)
Trochammina excavata Gauger, 1953 † (original description)
Dentalina coalvillensis Peterson, 1953 † (original description)
Dentalina frontierensis Peterson, 1953 † (original description)
Dentalina summitensis Peterson, 1953 † (original description)
Dentalina utahensis Peterson, 1953 † (original description)
Eouvigerina inflata Gauger, 1953 † (original description)
Haplophragmoides inflata Gauger, 1953 † (original description)
Haplophragmoides rugosa Gauger, 1953 † (original description)
Marginulina austinana var. wasatchensis Peterson, 1953 † (original description)
Marssonella conica Gauger, 1953 † (original description)
Planularia inflata Gauger, 1953 † (original description)
Spiroplectammina dentata var. tenuisa Gauger, 1953 † (original description)
Textularia inflata Gauger, 1953 † (original description)
Trochammina excavata Gauger, 1953 † (original description)