1. Claystones and siltstones containing finely dispersed coaly matter are considered to be good sources - besides many coal seams.

2. The tenement reared up, a coaly silhouette flaring red, from the steep bank below them.

3. Mianxian Group is coaly continental deposit of Lower and Middle Jurassic from Mianxian to Ziyangxian of South Shaanxi Puovince.

4. The coaly muddy water is difficult to use, the main reason is the small grainy coaly mucl is amassed in the coaly muddy water for a long time.

5. Eocene through lower Oligocene lacustrine shales and Oligocene through lower Miocene lacustrine and deltaic coaly shales are the mature source rocks.

6. Results show that the main factors influencing methane desorption include pressure, gas content, coaly moisture content, matrices size and temperature etc.

7. The sandstone-hosted copper deposits of Cretaceous age in the Chuxiong basin were closely related with the lower coaly formation, the middle cupriferous formation and upper gypsum-salt formation.

8. The certain oil and gas pertained to coals and coaly mudstones have been found in the Jurassic coal-bearing basins in NW China.