marl slate meaning in Hindi

Examples

1. The quarry exposes a section through the Marl Slate and the Ford and Raisby Formations of the Upper Permian.
2. The site is a working quarry in which is exposed a sequence of Lower Permian Yellow Sands overlying Marl Slate and Lower Magnesian Limestone.
3. The quarry was excavated in magnesian limestone, the lowest level of which is an exceptionally fossiliferous marl slate which has yielded the richest and most varied Permian flora in the Britain and is the type locality for the pteridosperm " Pseudoctensis middridgensis ".