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Oregon Water Science Center

Columbia River Basalt Stratigraphy in Oregon

In Cooperation with the Oregon Water Resources Department (OWRD)

Table of Geologic Units for Site YAMH 886

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USGS Site ID: Site identification number permanently assigned to the well by the U.S. Geological Survey and recorded in National Water Information System (NWIS), a national computer database maintained by U.S. Geological Survey.

Sequence Number: Sequence number assigned to identify a record.

Depth to Top of Interval: The depth to the top of this unit, in feet below land surface.

Depth to Bottom of Interval: The depth to the bottom of this unit, in feet below land surface. This field should be specified for all units, except the last one in the hole.

Unit code: The name of aquifer or geologic unit stored by the U.S. Geological Survey in National Water Information System (NWIS), a national computer database maintained by U.S. Geological Survey.

Lithology code: The principal lithology of this unit stored by the U.S. Geological Survey in National Water Information System (NWIS), a national computer database maintained by U.S. Geological Survey.

Description of material: The adjective modifier to describe the rock type.

--, no data/unknown.

USGS Site ID Well Log ID Sequence Number Depth to Top of Interval Depth to Bottom of Interval Unit code Lithology code Description of material
451835122535201 YAMH 886 1 0 78 COLUMBIA BASALT GROUP Clay --
451835122535201 YAMH 886 2 78 140 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt --
451835122535201 YAMH 886 3 140 200 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt --
451835122535201 YAMH 886 4 200 248 UMTANUM UNIT OF GRANDE RONDE BASALT Basalt --
451835122535201 YAMH 886 5 248 280 WAPSHILLA RIDGE UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
451835122535201 YAMH 886 6 280 355 WAPSHILLA RIDGE UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
451835122535201 YAMH 886 7 355 440 WAPSHILLA RIDGE UNIT OF GRANDE RONDE BASALT Basalt FLOW 3
451835122535201 YAMH 886 8 440 456 ELLENSBURG FORMATION Shale --
451835122535201 YAMH 886 9 456 488 WAPSHILLA RIDGE UNIT OF GRANDE RONDE BASALT Basalt FLOW 4
451835122535201 YAMH 886 10 488 491 ELLENSBURG FORMATION Tuff --
451835122535201 YAMH 886 11 491 531 WAPSHILLA RIDGE UNIT OF GRANDE RONDE BASALT Basalt FLOW 5
451835122535201 YAMH 886 12 531 -- MARINE ROCKS,OLDER Shale --
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Page Last Modified: Wednesday, 09-Jan-2013 18:54:10 EST