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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 59817

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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
451937122205201 CLAC 59817 1 0 42 TERRACE DEPOSITS Cobbles BOULDERS & GRAVEL ESTACADA FORMATION
451937122205201 CLAC 59817 2 42 341 TROUTDALE FORMATION Claystone --
451937122205201 CLAC 59817 3 341 575 VOLCANIC PYROCLASTIC AND SEDIMENTARY ROCKS Volcanic(undif) RHODODENDRON FORMATION
451937122205201 CLAC 59817 4 575 600 TUFF AND BRECCIA Tuff --
451937122205201 CLAC 59817 5 600 730 VOLCANIC PYROCLASTIC AND SEDIMENTARY ROCKS Volcanic(undif) RHODODENDRON FORMATION
451937122205201 CLAC 59817 6 730 815 TROUTDALE FORMATION Claystone --
451937122205201 CLAC 59817 7 815 860 BASALT OF SENTINEL GAP OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt --
451937122205201 CLAC 59817 8 860 950 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 1
451937122205201 CLAC 59817 9 950 1025 BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt FLOW 2
451937122205201 CLAC 59817 10 1025 1027 ELLENSBURG FORMATION Claystone --
451937122205201 CLAC 59817 11 1027 1070 BASALT OF SILVER FALLS OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt --
451937122205201 CLAC 59817 12 1070 1180 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt FLOW 1
451937122205201 CLAC 59817 13 1180 1272 BASALT OF GINKGO OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BASALT Basalt FLOW 2
451937122205201 CLAC 59817 14 1272 1275 VANTAGE MEMBER (INFORMAL USAGE) OF ELLENSBURG FORMATION Claystone --
451937122205201 CLAC 59817 15 1275 1350 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
451937122205201 CLAC 59817 16 1350 1410 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
451937122205201 CLAC 59817 17 1410 1465 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
451937122205201 CLAC 59817 18 1465 -- WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
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Page Last Modified: Wednesday, 09-Jan-2013 18:44:38 EST