During the ten years since the publication of the second edition of these tables many new minerals have been described. About fifty of these are included in the third edition of Part II,  which was published in 1933, while nearly seventy are of more recent date. The author has attempted to include in supplementary tables in this printing all the new minerals which seem to be well established and adequately described as to their optical properties. Unfortunately it has not been feasible to incorporate them in the main tables, but this is probably not a very serious difficulty since the minerals in question are all very rare.

It is hoped that the use of colored paper for the table (III) classifying minerals on the basis of their color (and pleochroism) in thin section will make it easy to find the various tables quickly and conveniently

In the preparation of this printing the author has benefited by the assistance and encouragement of his wife, Florence S. Winchell.

The special province of structural geology among the branches of geological science lies in the recognition, representation, and genetic interpretation of rock-structures. Without for the moment defining precisely what is meant by rock-structures, let us consider any geological cross-section showing beds in various attitudes — flat-lying or inclined, folded or faulted — perhaps in places intruded by igneous rocks or covered with lava-flows, and again in places metamorphosed. Such a section shows the shape and attitude of the various rock-units present, and is said to represent the geological structure of that part of the earth, in the plane of the section.

Jianchao Cai, Shuyu Sun, Ali Habibi and Zhien Zhang
Emerging Advances in Petrophysics:    Porous Media Characterization and Modeling of
Multiphase Flow
Yuming Liu, Bo Shen, Zhiqiang Yang and Peiqiang Zhao
Pore Structure Characterization and the Controlling Factors of the Bakken Formation 
Xixin Wang, Jiagen Hou, Yuming Liu, Ling Ji, Jian Sun and Xun Gong
Impacts of the Base-Level Cycle on Pore Structure of Mouth Bar Sand Bars: A Case Study of the Paleogene Kongdian Formation, Bohai Bay Basin, China
Hongwei Zhou, Di Liu, Gang Lei, Dongjie Xue and Yang Zhao

The depositional environments treated so far, and the lithologie associations generated in them, have either been wholly surficial (supracrustal) or they have had a significant supracrustal component. In contrast, the environmemts in which the rocks treated in Chapters 9,28,29,32 formed, were intracrustal. The lithologie associations described in Chapters 4,5,7, 11-14, 31,33, are partly intracrustal. <...>