Page 54 - Atlas of Sedimentary Rocks Under The Microscope

1 1 0, I l l Carbonate rocks
B i o c l a sts

Foraminifera (continued)

110 shows a number of species of micrite-walled f o rams
(cndothyracids). Note how the different sections show
different arrangements of chambers. Much of the sedi­
ment comprises fragmented bioclasts in a pink-stained.
non-ferroan calcite matrix.
Foraminifera are important contributors to pelagic
s e d iments. 1 1 1 shows numerous pelagic foraminifera in
an almost opaque micritic sediment. The large keeled
fo rms arc globorotalids, and smaller types include
rounded globcriginids.

1/0 Swmed thin section. Woo Dale Limestone. Louer
Carboniferous. Dam Dale. Derbyshire. Eng/am/; magnific­
ation x 19. PPL.
Ill: Swined lhin section. Upper Cretrwenus. Pindos Znne.
Central Greel'e: magnification x 35. PPL.
Other .foraminife ra are shown in 1 16, 120 and 157.

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