Complex sentence: The Lower Cambrian "group occupies the S.W. coast of Cærnarvonshire,..." The Cambrian is unique in its unusually high proportion of lagerstätte sedimentary deposits, sites of exceptional preservation where "soft" parts of organisms are preserved as well as their more resistant shells.
Split into simpler sentences: The Lower Cambrian "group occupies the S.W. coast of Cærnarvonshire,..." The Cambrian is unique in its unusually high proportion of lagerstätte sedimentary deposits. These are sites of exceptional preservation, where "soft" parts of organisms are preserved as well as their more resistant shells.