B3I1O1S1T1R1A1T1I1G2R1A1P3H4Y4
26 points
BIOSTRATIGRAPHY is validvalid
geological age determination using fossils [n]
the determination of age, etc., of sedimentary strata from fossils which they contain [n]
geological age determination using fossils [n]
the determination of age, etc., of sedimentary strata from fossils which they contain [n]