Jet cone

--The jet cone looks like a black Pagoda in the distance, standing in the Fanhua stone one by one, with a height of 2-4 meters and a bottom diameter of 2-5 meters. The cone is thin at the top and thick at the bottom. It is hollow in the body and has holes at the top. It is made of layers of lava cake.

Jet cone

Jet cone is a kind of rare volcanic geological landscape at home and abroad in the large fanhuashi in the northeast of Huoshaoshan and the north of Sanchi. The jet cone looks like a black Pagoda in the distance, standing in the Fanhua stone one by one, with a height of 2-4 meters and a bottom diameter of 2-5 meters. The cone is thin at the top and thick at the bottom. It is hollow in the body and has holes at the top. It is made of layers of lava cake.

brief introduction

The inner wall of the hollow is gray black and gray brown with longitudinal stripes or spinous and nodular nodules. There are two types of jet cones. One form is that the single-layer lava cake formed into a cone is relatively thick. The thickness of the single-layer lava cake is about 5-20 cm, and there are more than 10 to 20 layers. The cone is in the shape of a sharp cone or a tower, and the individual is high. This form is the most common in the area. Some of these cones appear as monomers or two or more aggregative groups. Another form is the formation of a cone of single-layer lava thin, single-layer thickness of 1-3 cm, Hanwa like. This kind of cone has many layers, up to more than 100 layers. It looks like a green tile. The individual is low and thick, and it looks like a tomb. This kind of jet cone is rare. Associated with the jet cone are many disc-shaped, corolla shaped and pit shaped jet discs composed of one or several layers of lava cake, which are the rudiment of jet cone.

origin

Among 1537 jet cones of WUDALIANCHI VOLCANIC group, most of them are distributed in Huoshaoshan lava flow. On the lava platform between Wudalianchi and Sichi, the jet cones are concentrated, large and well developed. Based on the analysis of the morphological structure and central distribution characteristics of jet cones of WUDALIANCHI VOLCANIC group, it is considered that water vapor plays a leading role in the formation of jet cones by mixed gas, Gravity also plays an important role in shaping the shape of jet cones. When the basic magma containing volatile matter overflows to the area near the water area, the surface layer condenses and consolidates, and the internal lava is still hot and low viscosity. It interacts with groundwater to form a mixture of volcanic gas and water vapor. When the gas breaks through the surface layer and overflows intermittently, it drives the lava to lift and stack around the jet hole to form jet cones, When the gas pressure is not enough to make the lava overflow from the vent, the growth of the jet cone stops

Address: Wudalianchi Town, Wudalianchi City

Longitude: 126.22608298511

Latitude: 48.611971868074

Tour time: 1 hour