hornfels वाक्य

उदाहरण वाक्य

1. The most common hornfels ( the biotite hornfels ) are dark-brown to black with a somewhat velvety weathered faces of the rock.
2. At Tievebulliagh, Northern Ireland, porcellanite is a tough contact metamorphosed hornfels formed from a lateritic soil horizon within a basaltic intrusive / extrusive sequence.
3. However, the diabase and related hornfels which form the backbone of the mountain are a type of highly erosion resistant stone known as trap rock.
4. This contact reveals the presence of indurated red sandstone that has been baked into a grey hornfels by the heat of the First Watchung lava flow.
5. In biotite hornfels, a faint striping may indicate the original bedding of the unaltered rock and corresponds to small changes in the nature of the sediment deposited.
6. Tourmaline hornfels are found sometimes near the margins of tourmaline granites; they are black with small needles of schorl that under the microscope are dark brown and richly pleochroic.
7. In addition to diabase, Haycock Mountain features a large area underlain by hornfels, or local sedimentary rock that has been baked by the heat of the magma intrusion.
8. The stone found at the quarry is not basaltic in origin, but a heavily-metamorphized sedimentary slate known as hornfels, that has a significant amount of silica.
9. Adjacent to the sills, the Hatakai Shale has been altered to knotted hornfels containing porphyroblasts of andalusite and cordierite that have been replaced by muscovite and green chlorite, respectively.
10. This is usually related to the metamorphic temperatures of pelitic or aluminosilicate rocks and the minerals they form . The metamorphic grades of aureoles are andalusite hornfels, sillimanite hornfels, pyroxene hornfels.