X1011403430-00139-37660</DOCNO> caving.htm CAVE EXPLORING The valleys of Central Pennsylvania are floored with carbonate rock and some of this is cave forming limestone.
(</DOCNO> caving.htm CAVE EXPLORING The valleys of Central Pennsylvania; are floored; with carbonate rock and some of this) (X1011403430-00139-37660</DOCNO> caving.htm CAVE EXPLORING The valleys of Central Pennsylvania are floored with carbonate rock and some of this; is; cave forming limestone) (cave; forming; limestone)
</DOCNO> caving.htm CAVE EXPLORING The valleys of Central Pennsylvania X1011403430-00139-37660</DOCNO> caving.htm CAVE EXPLORING The valleys of Central Pennsylvania are floored with carbonate rock and some of this cave
are floored is forming
with carbonate rock and some of this
cave forming limestone
limestone