This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help.
Summary
DescriptionNorwich Crag basement bed at St James Pit, Norwich 2011.jpg
English: The Norwich Crag basement bed at St James' Pit, Norwich, UK (2011), showing a lag of flint boulders in a sand and clay matrix overlying an eroded chalk surface. This was once a seabed, about 2 million years ago.
Date
Source
Own work
Author
Tall-timothy
Camera location
52° 38′ 11.58″ N, 1° 18′ 44.96″ E
View this and other nearby images on: OpenStreetMap
52.636550; 1.312490
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
You are free:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.