1. Divisions of potential fracture permeability, based on distribution of structures and lineaments, in sedimentary rocks of the Rocky Mountains-High Plains region, Western United States Yale Public content 1986. 2002-06-01T04:00:00Z. 2009-02-23T15:32:43Z. Geological Survey (U.S.). The Survey ; Open-File Services Section, Western Distribution Branch. English. Public.