black shale meaning in Hindi

Examples

1. In the Late Ordovician the turbidites were overlaid by a black shale.
2. They also occur in association with black shales of deep sea origin.
3. This rock unit is formed by quartzites, meta-black shales, amphibolites and skarns.
4. Many of these black shales are now rich in petroleum sources.
5. This is a black shale that is an important source of local fossils.
6. The Camp Run is a greenish-gray to olive-gray shale interbedded with brownish-black shale.
7. The background uranium content in the black shales is 40 to 60 ppm.
8. The south peak is a sharp pinnacle of black shale.
9. Higher levels of carbon dioxide in the black shale ".
10. The mineralisation is hosted by Palaeozoic meta-black shales and Meta-basalts.