dggs.alaska.govdggs.alaska.gov/webpubs/usgs/i/oversized/i-0942sht01.pdf · 2007-07-12 ·...

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Transcript of dggs.alaska.govdggs.alaska.gov/webpubs/usgs/i/oversized/i-0942sht01.pdf · 2007-07-12 ·...

Page 1: dggs.alaska.govdggs.alaska.gov/webpubs/usgs/i/oversized/i-0942sht01.pdf · 2007-07-12 · Aggradation of the trunk valleys raised base level and caused tributaries from the unglaciated