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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 CLAC 58435

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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
452650122091701 CLAC 58435 1 0 20 QUATERNARY ALLUVIUM Gravel ANDESITE
452650122091701 CLAC 58435 2 20 105 VOLCANIC PYROCLASTIC AND SEDIMENTARY ROCKS Breccia CASCADE VOLCANICS LANDSLIDE
452650122091701 CLAC 58435 3 105 112 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt --
452650122091701 CLAC 58435 4 112 125 VANTAGE MEMBER (INFORMAL USAGE) OF ELLENSBURG FORMATION Claystone --
452650122091701 CLAC 58435 5 125 171 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
452650122091701 CLAC 58435 6 171 177 ELLENSBURG FORMATION Claystone --
452650122091701 CLAC 58435 7 177 310 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
452650122091701 CLAC 58435 8 310 325 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
452650122091701 CLAC 58435 9 325 350 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
452650122091701 CLAC 58435 10 350 512 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 3
452650122091701 CLAC 58435 11 512 531 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt PILLOWS
452650122091701 CLAC 58435 12 531 538 ELLENSBURG FORMATION Claystone --
452650122091701 CLAC 58435 13 538 613 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
452650122091701 CLAC 58435 14 613 -- ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
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Page Last Modified: Wednesday, 09-Jan-2013 18:44:31 EST