What are metamorphic rocks?

Holdings

hidmidmiidnidwidlocation_codelocationbarcodecallnumdeweycreatedupdated
6504239474612266464424643283LETE281LETE100572552 PET55215754856551709567815
239049959210752368464424643283BLE110BLE0023101552.4 PET552.416377766271736800991
239050059210752368464424643283BLE110BLE0023227552.4 PET552.416377766271736800991
282760463114562389464424643283HOE263HOE0060324552.4 PET552.416377825731736800991