Taking the seagrass taxi: How foraminifera move from the coast to the depths of the Red Sea
Foraminifera are single-celled marine organisms with a calcareous shell. They not only provide evidence of past habitats, but ...
Sacramento State University10y
Lab #2: Sponges and Corals
2. #507 Girtyocoelia. This little Paleozoic sponge is calcareous. It grew in bulbous chambers around a central tube, as shown in the diagrams. 3. # 2004 Astraeospongia. Another Paleozoic calcareous ...