The Rhynie chert is an Early Devonian sedimentary deposit exhibiting extraordinary fossil detail or completeness -LRB- a LagerstA tte -RRB- .
The Rhynie chert is an Lower Devonian sedimentary deposit , part of the Old Red Sandstone . It has extraordinary fossil details , and is a LagerstA tte .
The Rhynie chert is an Lower Devonian sedimentary deposit , part of the Old Red Sandstone . It has extraordinary fossil details , and is a LagerstA tte .
简化这段文字: The Rhynie chert is an Early Devonian sedimentary deposit exhibiting extraordinary fossil detail or completeness -LRB- a LagerstA tte -RRB- . 输出: