|mhorn||Дата: Wednesday, 15.05.2013, 20:35 | Сообщение # 1|
|Donovan S.K., Pickerill R.K. (2013) On marls and marlstones // Bulletin of the Mizunami Fossil Museum, no. 39, P. 127–128. |
Marl and marlstone are antiquated geological terms that are commonly incorrectly applied in sedimentology. A marl is an unlithified deposit; a marlstone is a rock. The compositional definitions of marl and marlstone remain poorly delimited. We suggest that a more precise lithological term(s) is usually, perhaps always available for any so–called marl or marlstone.
Middle Jurassic - Lower Cretaceous ammonites & aptychi