Nan Evans of KPTZ and Seattle Naturalist David Willams, will discuss “A Sense of Place – What is it?” This is a prelude to David’s March 18th lecture entitled “Secrets of Seattle Geology—Connections of the human story and the geology story.”
The interview is for Nature Now, a weekly radio broadcast on KPTZ 91.9 MHz. The interview will be recorded as a MP3 file and broadcast three times preceding David’s March 18th lecture for the Quimper Geological Society:
Show #610: David Williams—A Sense of Place: What does that mean?
Broadcast on March 15 at 12:30 PM; March 16at 5:30 PM; and March 18 at 12:30 PM
Calcrete is a CaCO3-rich hardpan paleosol that forms in dry, stable landscapes of the world. Calcrete in eastern Washington cements a 20-m-thick interval across three geomorphic domains: Palouse Hills, Channeled Scablands, and Yakima Fold Belt. The sheet-like calcrete deposit encloses ancient Scabland flood gravels and defines a regional paleosurface that has been bent and broken by Quaternary faults. Calcrete overprints primarily lowland alluvial deposits (ancestral Columbia-Snake River floodplain) and basaltic alluvial fan gravels shed from fault-bounded ridges. Thick layers of pedogenic carbonate accumulated during the Pleistocene, between about 1.8 million years ago to about 40 thousand years ago, but older cements at somewhat deeper levels date back to ~7 million years (late Miocene). The appearance of arid-land calcrete ineastern Washington coincides with the topographic rise of the Cascade Range and establishment of a strong rain shadow east of the divide. This study sheds new light on this lesser-known part of eastern Washington’s stratigraphy.
Skye is a field geologist who specializes in mapping, paleosols, and geomorphology. His work focuses on the interplay between tectonics, topography, and climate. Skye received his BSc. in Geology from Whitman College and his MSc. from the University of Wyoming. He has been a Soil Scientist for the Colville Confederated Tribes and taught Geosciences at Boise State University.
Currently, Skye is mapping the surficial geology of the Mission Valley in northwest Montana and sorting out the geomorphic history of calcretes in Eastern Washington. Skye’s hobbies include woodworking, nordic skiing, and motor-cycles. Skye is married to Hilary, manager of the Grizzly Bear Program for the U.S. Fish and Wildlife Service. They live with their hound dog, Lucy, in northwest Montana.
The lecture will be at the First Baptist Church, 1202 Lawerence St., uptown Port Townsend. This is the same venue we used before Covid. Doors open at 3:30 pm and a cash donation would be greatly appreciated. This hybrid lecture will start at 4 pm on Saturday, April 29th. Use whatever protective measures you feel are appropriate; masks are not required. In addition to the church venue, we will broadcast on Zoom. This is free and open to the public, as are all our recorded events (see Quimper Geological Society).
The Talk. Unlike many regions in the country, the Seattle area is constantly reminded of its geologic past, present, and future. Whether it is our landslides, our glacier-carved topography, or our volatile volcanoes, this area’s geologic history is young, dynamic, and accessible. In this talk, I will explain why we can blame California for some of our geo hazards, how coal influenced our economic development, and why it’s harder to travel east/west than north/south.
Denny Hill, Seattle, 1910
The Lecturer. David B. Williams is an author, naturalist, and tour guide whose award-winning book, Homewaters: A Human and Natural History of Puget Sound is a deep exploration of the stories of this beautiful waterway. He is also the authorof Too High and Too Steep: Reshaping Seattle’s Topography, Stories in Stone: Travels Through Urban Geology, as well as Seattle Walks: Discovering History and Nature in the City. Williams is a Curatorial Associate at the Burke Museum and writes a free weekly newsletter, the Street Smart Naturalist.
Book sale/signing. David B. Williams will bring a supply of his award-winning books for sale before and after the lecture. He accepts cash, checks and can process credit cards.