Brachiopods are characteristic of shallow-marine environments and, in some Palaeozoic rocks, they are the main rock-forming component. Brachiopods are also particularly suitable for palaeoecological analyses. Influenced by such factors as water depth, salinity, oxygen levels and static lifestyle, the distribution patterns of fossil brachiopods provide a useful tool in deducing the position of ancient shorelines and the past distribution of land and sea. Because of the rapid evolution of some brachiopod lineages, they can be useful for understanding the relative ages of rock successions and for correlation.
bbc seven ages of rock download
2ff7e9595c
Comments