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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 MARI 53023

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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
451429122455301 MARI 53023 1 0 74 WILLAMETTE SILT Clay with some Sand --
451429122455301 MARI 53023 2 74 842 TROUTDALE FORMATION Clay --
451429122455301 MARI 53023 3 842 970 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
451429122455301 MARI 53023 4 970 -- WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
451429122455301 MARI 53023 5 970 -- WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt FLOW 2


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