Hammer modified for geomorphology research.
https://diqn32j8nouaz.cloudfront.net...dification.jpg
Previously:
https://www.homemadetools.net/forum/...602#post139551
https://www.homemadetools.net/forum/...6425#post83639
https://www.homemadetools.net/forum/...988#post133915
https://www.homemadetools.net/forum/...256#post126638
https://www.homemadetools.net/forum/...489#post117099
https://www.homemadetools.net/forum/...802#post100074
