Calcareous algae

abundant Adey algal mats algal-laminated sediments aragonite Archaeolithophyllum articulated coralline benthonic biological blue-green algae calcified calcispheres calcite calcium carbonate Cambrian carbonate facies carbonate sediments cells cellular tissue Cenozoic central stem characterized charophytes classification codiacean green algae conceptacles coral Corallinaceae coralline algae coralline red algae cortical Cretaceous cylindrical dasycladacean algae deposits depth developed Devonian encrusting Environmental distribution environments Epiphyton Eugonophyllum filaments fine-grained fossil fossil calcareous algae genera genus Geol Geologic range Girvanella green algae growth form growth habits Halimeda hypothallium Johnson laminated layers limestones Lithophyllum Lithothamnium living algae marine Maslov medullary Mesozoic microns morphology nonmarine nonskeletal occur Ordovician Ortonella Paleocene Paleozoic Parachaetetes perithallium Permian phylloid plants primary branches Recent red algae regions Renalcis reproductive organs rocks sedimentary sediments segments skeletal algae skeletal calcareous algae skeletal constituents Solenoporaceae species Sphaerocodium sporangia Squamariaceae stromatolites structures substrate taxa thallus thin section Transmitted light Upper Carboniferous Pennsylvanian Western Australia whorls Wray