11. The rock formations are andesite and rhyolite, forming a dropped fault block embedded in the Gabilan Range. 12. The Russian side contains a number of very large gas fields contained in Upper Jurassic sandstone fault blocks . 13. "' Fault blocks "'are very large blocks of rock, sometimes hundreds of kilometres in extent, created by faults. 14. The range is a large fault block of Cenozoic age created by the movements of the Santa Ynez Fault. 15. It and associated strata of the Unkar and Chuar groups are preserved in a prominent syncline and fault block . 16. Other types of range such as horst ranges, fault block mountain or truncated uplands rarely form parallel mountain chains. 17. As with other nearby folds, the structure is controlled by movement of fault blocks within the Jurassic strata below. 18. The Sarir field produces from a Cretaceous Sandstone in an anticline with fault blocks discovered from a seismic survey. 19. Most of the ranges in the system are fault blocks , and were uplifted by tectonic movements during the Cenozoic Era. 20. In physical geography and geology, a "'horst "'is the raised fault block bounded by normal German for " heap ".
