This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FMIB Surface of pile showing entrance holes of Xylotrya.jpeg check categories September Surface of pile showing entrance holes of Xylotrya Subject Piling Civil engineering Weathering Tag Coasts Cite book Report on the San Francisco Bay Marine Piling Survey San Francisco Bay Marine Piling Committee San Francisco CA San Francisco