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.
GlaciationsinEarthExistancelicenced annotated. en File GlaciationsinEarthExistancelicenced annotated with ice age names own William Connolley badJPEG ccbysa William Connolley Uploaded with Glaciological diagrams Geology timelines
Page 2023 Free-images.com. All images are Public Domain