41. A formation consists of a certain number of rock facies or other similar properties. 42. Since its inception, the facies concept has been extended to related geological concepts. 43. Crafford assigned these two facies respectively to the shelf domain and the basin domain. 44. The lower facies comprises the Peterborough Member, a fossiliferous organic-rich mudstone. 45. Prehnite-pumpellyite facies to mid-amphibolite facies have been produced by metamorphism. 46. Prehnite-pumpellyite facies to mid-amphibolite facies have been produced by metamorphism. 47. The Van Eyck Formation has a lineated facies and a secondary-crater facies. 48. The Van Eyck Formation has a lineated facies and a secondary-crater facies . 49. The Czorsztyn unit has the shallowest marine facies . 50. They consist of interlayered sedimentary and volcanic flow rocks metamorphosed to low greenschist facies .
