If the material recovered is gravel, the recovered taxa suggest that the vegetation at or near the Newport locality during the early part of the Plum Point Interstadial
had a boreal forest affinity.
In the warmer interstadial
periods, regions such as the Caucasus and southern Europe would have provided inviting venues.
Zone X, coincides with the late pleniglacial and with the local Philippi interstadial
. This interstadial
correlates with the Lascaux of northwest Europe (Wijmstra, 1969).
Although there is no chronometric information at present for this deposit, or the Mousterian occupation associated with it, it is obvious that the last phase in the formation of terraces would have occurred during a Wurmian interstadial
, belonging to OIS 3.
The commonly accepted model designates at least five till beds macroscopically distinguishable in glacial accumulative heights and buried bedrock valleys, occasionally separated from each other by Karukula (Holsteinian) and Prangli (Eemian) interglacial deposits or interstadial
beds (Liivrand 1991; Raukas & Kajak 1995, 1997).
The stratigraphic data, plus the associated fossil flora and fauna, and attempted dating suggest a Pleistocene age of pre-late Wisconsinan, representing at least an interstadial
if not an interglacial biota.
Fulufjallet, west-central Sweden--late Weichselian boulder blankets and interstadial
periglacial phenomena' Geografiska Annaler 72A, 63-78
Suggate (1965) described the interstadial
period between the deposition of the 2 loess mantles as being `comparable with, if not longer than the postglacial warming', which therefore allows sufficient time for weathering of the second loess layer and for the erosion events required to form the colluvial deposits between the 2 loess layers.
It is acknowledged, however, that refinements in the criteria (e.g., chronological and ecological) for distinguishing between Sangamonian interglacial and early Wisconsinan interstadial
deposits may necessitate a younger age assignment of the Iron Bridge local fauna.
Additionally, the runoff, soil erosion and allogenic input into the lake basin have been detected during colder periods, and pedogenesis--under the humid, interstadial
conditions (Hosek et al.