| Two facies of regionally metamorphosed rocks that may be of either original sedimentary or igneous derivation are characterized by epidote. |
| The bioclastic facies of the Upper Domerian and Upper Toarcian Limestone Mbrs suggest periods of shallower sedimentation above storm wave base. |
| The facies consists mainly of brownish grey laminated bioclastic packstone and thinly bedded cherts. |
| The auriferous veins there are usually interbedded sandstone mudstone varieties metamorphosed into greenschist facies. |
| Where cored the Auk Formation is easily identified because of the preservation of aeolian dune facies. |
| Urgonian facies are also characterized, negatively, by the absence of ammonites and belemnites. |
