oil shale (Q8072): Difference between revisions

@@ Property / subclass of @@
+sapropelite
@@ Property / subclass of: sapropelite / rank @@
+Normal rank
@@ Property / subclass of @@
+fossil fuel
@@ Property / subclass of: fossil fuel / rank @@
+Normal rank
@@ Property / subclass of @@
+carbon schist
@@ Property / subclass of: carbon schist / rank @@
+Normal rank
@@ Property / subclass of @@
+marl
@@ Property / subclass of: marl / rank @@
+Normal rank