calcite
Calcite chemical formula for CaCO, is the most widely distributed carbonate minerals in nature, belongs to the trigonal system (rhombohedral system), because the crystal is often a rhombohedral (rhombohedral) morphology and named. Its English name "Calcite" is derived from the Latin "calx" (meaning lime), which is the main component of limestone and marble.
Geological Map of Romania
Romania is located in the northeastern part of the Balkan Peninsula in southeastern Europe, and its geological structure is deeply influenced by the Alpine orogeny, forming a variety of tectonic units and geomorphological types. Main geological regional features: Carpathian Mountains, Transylvania Basin, Lower Danube Plain, Banat Basin. The geological structure of Romania is complex and diverse, combining Precambrian basement, Alpine orogenic belt and young sedimentary basin. Its rich mineral resources, active seismic zones and unique landforms.
brown pyroclastic with porphyrite
Pyroclastic is a porous, light pyroclastic rock formed by rapid cooling after the eruption of basaltic magma. Black, dark gray or brown (depending on the degree of oxidation). Rich in pores (bubbles), loose texture, low density. Basalt, containing pyroxene, plagioclase and other dark minerals.
Geomorphic structure of Niujiaohu Lake
The Cowbow Lake is called the Cowbow Lake because its shape resembles that of a cow's yoke. They are mostly distributed in the the Middle and Lower Yangtze Valley Plain and the Northeast Plain. Generally, it is a freshwater lake with a crescent shaped shape, an open water surface, a developed economy around the lake, abundant cultural and historical relics, and high tourism value. Many large oxbow lakes in China are formed by natural levees blocking tributaries due to river fluctuations, such as Dongting Lake, Poyang Lake, Baiyangdian Lake, Hongze Lake, etc.
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