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1

2021-06 October Newsletter

The Mars 2020 Perseverance rover, NASA’s most recent Mars rover
mission, landed in Jezero crater in February 2021. The landing site is near one of
the oldest and best-preserved river deltas on Mars.

3

April 2021

This presentation will be a snapshot tour of selected sites where subfossil trees have been found.

4

March 2021

If you’ve ever wondered why some rivers have whitewater, and what that tells
us about underlying processes of fluids on Planet Earth, this talk will answer those
questions and more. Starting

5

February 2021

A cluster of more than 20 Miocene to Recent volcanoes in the Andes of northern
Chile record systematic changes in magmatism that have parallels in batholith assembly,
such as recorded in the Tuolumne Intrusive Complex of the Sierra Nevada, California.

6

January 2021

Paleoseismic studies documented prehistoric earthquakes after the last glaciation ended ~15
ka on 13 upper-crustal fault zones in the Cascadia fore arc. These

7

August 2020

The western portion of the North American continent encompasses a vast and scenic landscape that holds an equally vast geologic history.

8

July 2020

Washington (WA) is politically not friendly to exploration and mining. Pluses for WA are abundant infrastructure, water, and prospects. Other factors hinder exploration.

9

June 2020

Member safety is our primary concern in these uncertain times. Take care and best of health.

11

March 2020

Quicksand in the Ancient Sand Desert: Occurrence and Implications of Soft Sediment Deformation in the Navajo Sandstone