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December 2012

'Tis the Season of STATEMAP--
This month, The Washington State Geological Survey (a.k.a. DNR Geology and Earth Resources) is pleased to release the three 7.5-minute quadrangle geological maps that constitute the 2012 STATEMAP products. These maps are the first publications in our new Map Series, which was created in recognition of the fact that the quality of our geologic maps far exceeds the expectations for publications under the Open File Reports category.
The first of the three maps, which was officially published last week, is the Lake Joy 7.5-minute quadrangle.

The fieldwork for Lake Joy was completed during the summer-fall of 2011 and was led by Joe Dragovich, principal mapping geologist of the WA State Geological Survey. Mapping this quadrangle resulted in several discoveries about the fault systems that run through the area. For example, the mappers show that the northeast-trending left-lateral strike-slip Cherry Creek and Tokul Creek fault zones join to the northwest-trending Southern Whidbey Island Fault (SWIF) zone, and that the two fault zones appear to be seismically active. Furthermore, these fault zones may be the source of recently-felt seismic events. Joe tells us that "The 1996 Duvall earthquakes (maximum magnitude 5.3) likely resulted from shallow displacements along the trace of our Cherry Creek fault zone near the northwestern corner of the quadrangle."
Thumbnail of Lake Joy 7.5-minute quadrange geologic map, Plate 1

Lake Joy 7.5-minute quadrangle geologic map Plate 1 (thumbnail image).

The Lake Joy map can be downloaded in digital format by clicking here (warning--file size exceeds 93 MB!) or you can purchase a paper copy through the Washington State Department of Enterprise Services online system by clicking here.

We congratulate Joe and his team on their fine work and look forward to their upcoming maps. They are currently mapping the Sultan quadrangle, directly to the north of Lake Joy. 


Lake Joy is the first of three 2012 STATEMAP products that we will publish this year. The Eldon and Brinnon quadrangles are coming very soon!

What's New on the Portal?

Portal Basemap menu bar 



This week we updated our Geologic Information Portal with some extra functionality--namely giving the user a greater number of options for the basemap. Now you can choose to view other topographic and shaded relief maps behind the portal data, in addition to the street and image basemaps. 
We now also provide a portal user guide, which supplements the portal tool index on our website. The user guide is accessed through the portal's help section.
Mount Rainier from PCT 


December Geology Image of the Month

December's Image of the Month comes to us from Washington State Geological Survey geologist J. Eric Schuster. Of the image he says, "I took the picture from the Pacific Crest Trail above Crystal Mountain ski area on September 23, 2011.  The view is to the southwest toward Mount Rainier (14,410 ft, 4392 m).  The Emmons Glacier dominates the center of the photo, with Little Tahoma Peak to the left at 11,139 ft (3395 m) and Willis Wall to the right, partially in clouds.  The ridge in the foreground is Crystal Mountain."




We welcome public contributions for the Geology Image of the Month feature. The images have pride-of-place as our header image for our blog site, www.washingtonstategeology.wordpress.com, for the month, and are archived in the blog site's Image Gallery.
If you have a Washington geology image that (1) you have the rights to share, (2) can be cropped horizontally to fit our header space, and (3) for which you have a detailed description of the subject matter, contact us! We'd love to show off your great pics!

Wishing you & yours a safe and happy holiday season!

Washington Geological Survey

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Washington State Department of Natural Resources | 360-902-1000 | bob.redling@dnr.wa.gov | http://www.dnr.wa.gov
1111 Washington St. SE
Olympia, WA 98501

Copyright 2012. All Rights Reserved.