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

I recently bought a 2017 Honda CRF250L with less than 500 miles on it. It has a full Yoshimura RS-4 exhaust system, aftermarket fuel controller, and Acerbis 3.1 gallon tank. The bike is in like-new condition. It starts up quickly, idles fine, does not leak anywhere, does not smoke, no rattles, and revs up smoothly at idle. The only problem is that it misfires randomly at all RPMs when the engine is under load (e.g., when riding it). No error codes on dash. Decel pops are noti

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