Larger foraminifera is the term applied to those benthonic foraminifera which in general are relatively large and of which only the internal structure can be used for determination. Thus tests must be sectioned.The rapid evolution of most taxa makes larger foraminifera a valuable group for relative age determination. However, for a variety of reasons they probably are the most difficult to use for biostratigraphy :All larger foraminifera...
Wednesday, October 22, 2008
About foraminifera
Planktonic foraminifera are everywhere used as a tool for biostratigraphic purposes, but in some cases due to the unfavourable conditions they are not always present. Moreover these planktonic foraminifera are not always well preserved, oftenly indeterminable and undiagnostic. Thus another biostratigraphic tool is wise to be exposed. Many investigations indicated that the benthonic foraminifera very useful in dating the sediment...
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