https://vocabularyserver.com/cnr/ml/earth/en/https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930boundary https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 [PARAMETERS, CRITERIA AND FACTORS] BT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 type section RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 geological formation RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 key bed RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 guide fossil RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 heteropy RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 correlation RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 stratigraphic column RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 K-T boundary RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 range RT https://vocabularyserver.com/cnr/ml/earth/en/xml.php?skosTema=131930 unconformity RT