Figure 4
From: Arthropod entombment in weathering-formed opal: new horizons for recording life in rocks
Scenario of sample formation. (a) Life cycle of an extant cicada. The white bracket identifies the instars corresponding to our sample compare with Fig. 3. (b) Fossilization of cicada exuvia. Percolating fluid (represented by blue arrows) fills the cavity, and zeolites crystallize on exuvia. (c) The precipitation of opal sealed the exuvia in place, forming the well-preserved fossil. Drawing by F. Gangloff.
