- Joined
- Nov 6, 2012
- Messages
- 136
there are a few ammonite shell anatomy terms that have been confusing me.
what do the terms "whorl" and "volution" mean? are they the same thing? are they a full revolution shell growth (360 degrees?) around the unbilical axis? or just 3/4 (270 degrees?) around it?
what do the terms "whorl" and "volution" mean? are they the same thing? are they a full revolution shell growth (360 degrees?) around the unbilical axis? or just 3/4 (270 degrees?) around it?