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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 BAGD 23-28

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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
450612122563901 BAGD 23-28 1 40 430 TROUTDALE FORMATION Sand, Gravel, and Clay --
450612122563901 BAGD 23-28 2 830 1070 TROUTDALE FORMATION Clay --
450612122563901 BAGD 23-28 3 1070 1150 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt --
450612122563901 BAGD 23-28 4 1150 1210 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt --
450612122563901 BAGD 23-28 5 1210 1270 UMTANUM UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
450612122563901 BAGD 23-28 6 1270 1340 UMTANUM UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
450612122563901 BAGD 23-28 7 1340 1350 ELLENSBURG FORMATION Siltstone --
450612122563901 BAGD 23-28 8 1350 1420 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
450612122563901 BAGD 23-28 9 1420 1600 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
450612122563901 BAGD 23-28 10 1600 -- MARINE ROCKS,OLDER Claystone --
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Page Last Modified: Wednesday, 09-Jan-2013 18:43:32 EST