Image: Robertson core
Size of this preview: 800 × 600 pixels. Other resolutions: 320 × 240 pixels | 2,816 × 2,112 pixels.
Original image (2,816 × 2,112 pixels, file size: 3.19 MB, MIME type: image/jpeg)
Description: Core sample and geologic timeline permanently displayed along the wall of the eastbound platform of the Washington Park station of the MAX light rail system, in Portland, Oregon.
Title: Robertson core
Credit: Taken by Ulmanor with a Canon PowerShot S3 IS
Author: Ulmanor at en.wikipedia
Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
License Link: https://creativecommons.org/licenses/by/2.5
Attribution Required?: Yes
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