“Our new geochronologic data reported here both complement and support prior geochronological work on the metamorphic history of the Sudetic high-grade terranes.”

“However it is not clear how these units are related to each other because of poor exposure and lack of detailed geochronologic data.”

“These are used in geochronologic and thermochronologic studies.”

“Of course, this notion needs further geochemical and geochronological confirmation.”

“So far, only few biostratigraphically well-constrained isotopic ages constitute the geochronological framework of the Devonian period.”

“However, geochronological evidence for such processes has not been found yet.”