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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 WASC 50928

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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
453205121023001 WASC 50928 1 0 135 DALLES GROUP Sandstone --
453205121023001 WASC 50928 2 135 215 BASALT OF ROSALIA OF PRIEST RAPIDS MEMBER OF WANAPUM BASALT Basalt --
453205121023001 WASC 50928 3 215 240 BASALT OF SENTINEL GAP OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt --
453205121023001 WASC 50928 4 240 290 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 1 WITH PILLOW BASALT
453205121023001 WASC 50928 5 290 360 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 2
453205121023001 WASC 50928 6 360 535 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 3
453205121023001 WASC 50928 7 535 575 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt OR SILVER FALLS FLOW, FLOW 1
453205121023001 WASC 50928 8 575 715 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt FLOW 2 WITH PILLOW BASALT
453205121023001 WASC 50928 9 715 720 ELLENSBURG FORMATION Claystone --
453205121023001 WASC 50928 10 720 810 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt --
453205121023001 WASC 50928 11 810 -- GRANDE RONDE BASALT OF YAKIMA Basalt VESICULAR FLOW
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Page Last Modified: Wednesday, 09-Jan-2013 18:51:16 EST