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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 MORR 50791

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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
454251119541201 MORR 50791 1 0 60 ALKALI CANYON FORMATION OF DALLES GROUP Gravel, Silt, and Clay --
454251119541201 MORR 50791 2 60 90 ELEPHANT MOUNTAIN MEMBER OF SADDLE MOUNTAINS BASALT Basalt --
454251119541201 MORR 50791 3 90 158 RATTLESNAKE RIDGE MEMBER (INFORMAL USAGE) OF ELLENSBURG FORMATI Gravel and Clay --
454251119541201 MORR 50791 4 158 300 POMONA MEMBER OF SADDLE MOUNTAINS BASALT Basalt --
454251119541201 MORR 50791 5 300 461 SELAH MEMBER (INFORMAL USAGE) OF ELLENSBURG FORMATION Sandstone --
454251119541201 MORR 50791 6 461 548 BASALT OF LOLO OF PRIEST RAPIDS MEMBER OF WANAPUM BASALT Basalt --
454251119541201 MORR 50791 7 548 750 BASALT OF SENTINEL GAP OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt FLOW 1
454251119541201 MORR 50791 8 750 796 BASALT OF SENTINEL GAP OF FRENCHMAN SPRINGS MEMBER OF WANAPUM B Basalt FLOW 2
454251119541201 MORR 50791 9 796 -- BASALT OF SAND HOLLOW OF FRENCHMAN SPRINGS MEMBER OF WANAPUM BA Basalt --
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Page Last Modified: Wednesday, 09-Jan-2013 18:46:10 EST