... a secondary pollen assemblage with abundant deciduous pollen, like those found in a Yarmouthian interglacial deposit in Indiana. In all the others, pine ( Pinus ) pollen dominate. This phenomenon is explained by glacial incorporation of sediments enriched in overproduced Pinus pollen, which had accumulated...

..., nonfossiliferous Sundance till of northwestern provenance and related to a Kansan or Illinoian glaciation. The paleosol developed in the Sundance till is assigned to the Yarmouthian or Sangamon interglacial on its stratigraphic position and depth of weathering. Fossiliferous, clayey Amery till of eastern...

..., and normally small, active species become large, heavily constructed, and inactive. Echinoid assemblages studied in detail are from the Waccamaw Formation (Aftonian?) of North and South Carolina, and the Canepatch Formation (Yarmouthian?) of Horry County, South Carolina. Studies of associated biota...

... resembles those described from terrace localities that lie above 100 feet on other California Channel Islands. An age close to Yarmouthian or Aftonian is suggested for the higher island terraces, and one of Sangamonian for the lower terraces. GeoRef, Copyright 2004, American Geological Institute...

..., an Aftonian stand at 90-100 ft, a Yarmouthian stand at 40-70 ft, and a Sangamonian stand at about 25 ft. The classic exposures of the Fort Thompson and Caloosahatchee Formations on the Caloosahatchee River are the best sections for correlation. Cooke’s four marine units in the Plio-Pleistocene sequence...

... streams at the time of a far-reaching ash fall during the middle Pleistocene (late Kansan or early Yarmouthian). According to these indicated positions, the bulk of the alluvium was deposited before the ash fall. 7 7 1958 Copyright © 1961, The Geological Society of America, Inc. Copyright...

... relief. Note expansion variations along counter-regional fault lessen from northeast segment to southwest segment. This interval correlates with the end of Kansan glacial to beginning of Yarmouthian interglacial stage ( Table 1 ), implying rapid sedimentation and active fault growth. (B) Isopach...

...., (1946) Fossil and living Pupillidae (Gastropoda: Pulmonata) in Kansas. Univ. Kansas Sci. Bull., v. 31, pt. II, no. 15, pp. 313-411, pIs. 17-22. LEONARD, A, BYRON, (1950) A Yarmouthian molluscan fauna in the Midcontinent region of the United States. Univ. Kansas Pal. Contr. Mollusca, Art. 3, pp. 1-48, pI...

... prograding sediments of Illinoian and Wisconsinan ages. A surface of parallel reflectors indicated by “ D ” is interpreted to represent the top of the Yarmouthian interglacial. This surface was not penetrated by the core hole, but, since middle and late Illinoian sediments were recovered from the lower part...

...Figure 2. Simplified version of former conceptual framework for study area deposits. In this framework the Pearlette ash bed (Xs) was thought to be late Kansan or early Yarmouthian in age (modified from Reed and Dreezen, 1965 ). Stratigraphic framework of Boellstorff is shown for pre–Illinoian...

... A/m Sangamonian 5 955 76 0.038 0.018 Illinoian 3 1081 86 0.043 0.048 Yarmouthian 5 691 55 0.028 0.046 Aftonian 6 930 74 0.037 0.010 Nebraskan 1 327 26 0.013 0.021 Upper Pliocene 8 817 65 0.033 0.012 (4 samples)           0.263 (4 samples...

... in the Midwest dated to the Quaternary (Roy et al., 2004). Early work on the stratigraphy of tills deposited prior to the Illinoian Glaciation resulted in a grouping into four categories referred to as the Nebraskan, Aftonian, Kansan, and Yarmouthian glaciations (Hallberg, 1986). These deposits are largely...

... America traditionally is thought to have begun in the Pliocene with the Nebraskan glacial period (3.45 Ma), followed by the Kansan (2.42 Ma), Illinoian (0.61 Ma), and Wisconsinian (0.19 Ma), with the intervening Aftonian (3.24 Ma), Yarmouthian (2.14 Ma), Sangamonian (0.48 Ma), and Peorian (0.12 Ma...

... correlation remains to be done, the Ferdinandowian appears to be roughly equivalent to the late Yarmouthian Interglacial of North America. Thermoluminescence measurements from three sections of the Ferdinandowian suggest ages of ca. 520–550 ka, which may be better viewed as a relative rather than an absolute...

... occurrences in North America are restricted to interglacial deposition: Aftonian, Yarmouthian, and Sangamonian Interglacial times (see text-figures 3 and 4 ). Apparently Pleistocene CP zone deposits in North America are absent in preglacial or early Pleistocene, Nebraskan, Illinoian, and (all but the latest...

... valleys of the region. In describing the "Black til l ," which in the Medicine Hat Section is probably the equivalent of the Labuma Till elsewhere, Stalker and Churcher (1972, p. 112) show it as being of Illinoian age. This age designation is based on its position above beds containing Yarmouthian...