| Urgonian facies are also characterized, negatively, by the absence of ammonites and belemnites. |
| Where cored the Auk Formation is easily identified because of the preservation of aeolian dune facies. |
| To accomplish these, however, a more thorough paleontological investigation of each taphonomic facies is necessary. |
| The laminated mudstone facies appears to decrease in abundance towards the east. |
| Geologists and geophysicists aim to accurately constrain the architecture and facies variations at the lava flow scale. |
| The auriferous veins there are usually interbedded sandstone mudstone varieties metamorphosed into greenschist facies. |
