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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 53582

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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
450709122554701 MARI 53582 1 45 1285 TROUTDALE FORMATION Conglomerate --
450709122554701 MARI 53582 2 1285 1360 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
450709122554701 MARI 53582 3 1360 1430 SENTINEL BLUFFS UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
450709122554701 MARI 53582 4 1430 1580 WINTER WATER UNIT OF GRANDE RONDE BASALT Basalt --
450709122554701 MARI 53582 5 1580 1705 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 1
450709122554701 MARI 53582 6 1705 1710 ELLENSBURG FORMATION Sand --
450709122554701 MARI 53582 7 1710 1770 ORTLEY UNIT OF GRANDE RONDE BASALT Basalt FLOW 2
450709122554701 MARI 53582 8 1770 -- MARINE ROCKS,OLDER Siltstone --
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Page Last Modified: Wednesday, 09-Jan-2013 18:45:01 EST