If you've worked as a Geologist in the West, its a fairly safe bet J.T. Pardee visited your field area decades before you arrived....

The definitive article on clastic dikes in Eastern Washington. Origin, age, character, and distribution are discussed. Data driven research.

INTRODUCTION Glaciation of Mission Valley The Cordilleran Ice Sheet invaded northwestern Montana multiple times during the Pleistocene, overtopping mountain ranges, widening pre-glacial river valleys, and depositing moraines composed of clay-gravel diamicts that often lack a full complement of boulders. Mission Valley is a structural trough that extends south of Flathead Lake between Polson, MT and the Ravalli Hill divide. Two prominent, horseshoe-shaped moraines indicate the

This article explores the spectacular calcretes of south-central Washington. The thick, bright white CaCO3-rich paleosols overprint the Pliocene Ringold Fm, Plio-Pleistocene fanglomerates, pre-Wisconsin flood gravels, and early Palouse loess. The blanket-like hardpans formed in alluvial sediments low in the landscape where strong evapotranspiration moved large volumes of water through the soil column via vegetation rooted near the water table. The aridity necessary to precipi

Steep cutbanks along West Foster Creek expose glacial deposits inset into a thick package of Miocene Ellensburg Fm. Till and haystack...

Rulo is a Palouse outcrop with a twist . The Rulo site is a large, double-sided roadcut located a few miles northwest of Walla Walla along Sudbury Road. Roadcuts and nearby outcrops expose what at first appears to be the same-old, same-old innards of a Palouse loess hill, but upon closer inspection proves to be much more interesting. Faulted Miocene basalt bedrock is overlain by locally-derived gravel and an unusual micaceous, fossiliferous fluvial deposit of Pliocene age. Ab

The Reese Coulee site is a two-sided roadcut along Hwy 12 between Wallula Junction and Touchet, WA. The cut is important because Missoula...

J.S. Diller, the Geologist in charge of the Cascade Division for the U.S. Geological Survey, dispatched a young Israel C. Russell to...

Thanks for all who attended the 2023 Friends of the Pleistocene PNW Cell's field trip and for sending in your pics! Calcrete. Proper...

Focus Shifts North Paleo-outburst flood indicators including large bedform trains and iceberg scour marks have been discovered in Okanogan Valley and other south-trending valleys of NE Washington (Gombiner & Lesemann 2024, Lesemann et al. 2024). Identical features are known in the Channeled Scabland and other outburst flood tracts worldwide, including Iceland. The features document glacial floods of significant size and sourced in southern British Columbia spilled south into