Evidence of multiple late Pleistocene outburst floods, upper Tanana River valley, east-central Alaska (presentation): Geological Society of America Cordilleran Section and Rocky Mountain Section Joint Meeting, Las Vegas, Nevada, March 19-21, 2008

In 1988, the presence of an Early Pennsylvanian ammonoid assemblage within the basal meter of the Callville Formation (Pennsylvanian-Permian), eastern Clark County, Nevada, was brought to the attention of the author by Stephen M. Rowland, University of Nevada-Las Vegas. The ammonoids occur in the Frenchman Mountain section described by Rowland (1987) for the Geological Society of America's Decade of North American Geology (DNAG) field trip compendium. The mid-Carboniferous section at this locality (Figure 1) was discussed in two other field trip guides as well (Langenheim and Webster, 1979; Webster et al., 1984). No ammonoids have been reported previously from this locality. Although this is the first record of Cancelloceras from the Great Basin region, the assemblage also provides a narrowly constrained age for the basal part of the Callville Formation at Frenchman Mountain, which in turn, dates the initiation of carbonate deposition following a major mid-Carboniferous hiatus in the southern Great Basin.

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Pleistocene horses (genus Equus) in the central Balkans

Geoloski anali Balkanskog poluostrva ◽

10.2298/gabp0301055f ◽

2003 ◽

pp. 55-75 ◽

Cited By ~ 8

Author(s):

Ann Forsten ◽

Vesna Dimitrijevic

Keyword(s):

Late Pleistocene ◽

River Valley ◽

Middle Pleistocene ◽

Mountainous Area ◽

Migration Routes ◽

Northern Greece ◽

The North ◽

Time Period ◽

Morava River ◽

River Valleys

A review of the fossil horses of the genus Equus from the central Balkans, a mountainous area comprising Serbia and Montenegro, is presented in this paper. The time period covered by the finds is from the late Early to and including the Late Pleistocene, but the record is not complete: the dated finds are Late Pleistocene in age, while Early and Middle Pleistocene are poorly represented. The horses found resemble those from neighbouring countries from the same time period, probably showing the importance of river valleys as migration routes. The Morava River valley runs in a roughly south-to-north direction, connecting, via the Danube and Tisa River valleys the Hungarian Pannonian Plain in the north with northern Greece in the south, via the Vardar River valley in Macedonia. In Pleistocene, large mammals, including horses, probably used this route for dispersal.

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A LATE CRETACEOUS PLANT ASSEMBLAGE FROM EAST-CENTRAL BRITISH COLUMBIA: I, FOSSIL LEAVES

Canadian Journal of Earth Sciences ◽

10.1139/e67-080 ◽

1967 ◽

Vol 4 (6) ◽

pp. 1185-1197 ◽

Cited By ~ 10

Author(s):

G. E. Rouse

Keyword(s):

Pollen Grains ◽

Rocky Mountain ◽

The United States ◽

Spores And Pollen ◽

East Central ◽

Mountain Ranges ◽

Plant Assemblage ◽

The Pacific ◽

Fossil Leaves ◽

The Pacific Ocean

Leaf compressions, spores, and pollen grains referrable to about 45 species were collected from a series of fine silts and coal stringers in the Parsnip River valley of the Rocky Mountain Trench. The leaf assemblage described in this paper indicates a late Maestrichtian to Danian age, somewhat younger than generally comparable assemblages previously reported from the lower part of the Edmonton Formation of Alberta, and from the Hell Creek, Lance, and Fox Hills Formations in the western interior of the United States. It also contains several species reported from the Nanaimo Group on eastern Vancouver Island. Plant microfossils (to be described in a later paper) include species of Glyptostrobus, Sciadopitys, Aquilapollenites, Pistillipollenites, Alnus, Myrica, Tilia, Pterocarya, and Carya, together with tricolpate pollen of uncertain affiliation. The combined leaf and microfossil assemblages indicate a warm mesothermal and humid paleoecological setting of low relief, suggesting absence of major mountain ranges westward to the Pacific Ocean.

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