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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 18421

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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
451856122324701 CLAC 18421 1 0 62 BORING LAVA Claystone --
451856122324701 CLAC 18421 2 62 840 TROUTDALE FORMATION Sand, Gravel, and Clay --
451856122324701 CLAC 18421 3 840 933 BASALT OF SENTINEL GAP OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt --
451856122324701 CLAC 18421 4 933 972 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 1
451856122324701 CLAC 18421 5 972 1013 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 2
451856122324701 CLAC 18421 6 1013 1110 BASALT OF SILVER FALLS OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt --
451856122324701 CLAC 18421 7 1110 1113 ELLENSBURG FORMATION Claystone --
451856122324701 CLAC 18421 8 1113 1205 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt FLOW 1
451856122324701 CLAC 18421 9 1205 1210 ELLENSBURG FORMATION Claystone --
451856122324701 CLAC 18421 10 1210 1263 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt FLOW 2
451856122324701 CLAC 18421 11 1263 1265 VANTAGE MEMBER (INFORMAL USAGE) OF ELLENSBURG FORMATION Claystone --
451856122324701 CLAC 18421 12 1265 1388 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
451856122324701 CLAC 18421 13 1388 -- SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
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Page Last Modified: Wednesday, 09-Jan-2013 18:44:04 EST