The unloading cranny was distributed primarily in the east precipice and wide noumenon with large aperture and long extension as well as largest destructibility.
The paper has summarized systematically evolutionary law in time and space on petrofacies and paleogeography of Late Paleozoic era in Northern China and distributive law of depositional systems.
Some of it remained here, cooling and solidifying forming a black gray lava plateau measuring hundreds of square kilometers wide, commonly known as the Rock Field.
Around the head waters of the Yuba, Feather, and Pitt rivers, the extensive tablelands of lava are sparsely planted with pines, through which the sunshine reaches the ground with little interruption.