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(a) Bryozoans (1) and some fragments of red      (b) Red algae (1). Magnification 4x.
algae (2). Magnification 10x.

(c) Benthic (1) and planktonic (2)               (d) Planktonic foraminifera (1). Magnifica-
foraminifera. Magnification 4x.                   tion 10x.

(e) Echinoderm spine (1), mollusk fragment       (f ) Syntaxial cementation developed around
(2) and syntaxial cementation (3). Magnifi-       fragments (1). Magnification 4x.
cation 4x.

Figure 4.3 – Thin section examples showing fossil content and diagenetic processes. The size of
the red scale bar is respectively 500 µm and 200 µm for the 10x and 4x magnifications. Abrasion
due to the creation of thin sections may have changed the original grain orientations. Images
and interpretation courtesy of Dr. X. Marquez.

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