And Long Basin

and Dragon Basin in the upper reaches of the Heilan River, east is Nang Mountain, west as the peak. Soced by Qinglong, a born generation trap in the north and south. The flat outline is nearly one rectangle, 15 kilometers north and south, 3 to 8 kilometers wide, with an area of ​​about 55 square kilometers. The basin received a thicker chalk straw deposition. The upstream of the Hailan River is obliquely in the northeast of the northeast. There is a narrow valley plain along the river, 1 to 3 km wide, sea level 420 ~ 480 meters. There are multi-stage ternations on both sides, relatively high 20 to 100 meters, due to the cutting of rivers and villages, there are more beam shapes, mainly chalkous gravel composition, overlying rough loess. The surroundings gradually transition to Zhongshan and the Low Mountains of the altitude of about kilometers, along the river plains, have large waterfields, Taiwanese multi-dry fields or orchards. He Yilong County is located on the right bank of the Basin.