Purcell Trench

Purcell Trench (HM2ALB)

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N 47° 44.358', W 47° 44.358'

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Inscription
A long, glaciated valley, extending from British Columbia this far into Idaho, brought part of a continental ice sheet past here thousands of years ago.
Rocks and boulders transported here by glacial ice backed up Lake Coeur d'Alene. Then a gradually warming climate let an outlet from Lake Pend d'Oreille (sic) discharge past here — sometimes with catastrophic results. As ice receded, Kootenai River also flowed past here before lower channels in British Columbia no longer were blocked by a glacial barrier. In those days, this was Columbia River's main channel.
Details
HM NumberHM2ALB
Series This marker is part of the Idaho: Idaho State Historical Society series
Tags
Placed ByIdaho Department of Transportation
Marker ConditionNo reports yet
Date Added Sunday, August 19th, 2018 at 5:01pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)23T E 294640 N 5290959
Decimal Degrees47.73930000, -47.73930000
Degrees and Decimal MinutesN 47° 44.358', W 47° 44.358'
Degrees, Minutes and Seconds47° 44' 21.48" N, 47° 44' 21.48" W
Driving DirectionsGoogle Maps
Which side of the road?Marker is on the right when traveling East
Closest Postal AddressAt or near , ,
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