The term geology is a combination of two Greek expressions: “Geo” refers to the earth, and “logos” refers to the logic and language used to explain your observations. So think of geology as a way to organize and explain the earth processes that we see all around us. For some of the strange shapes we see, an educated explanation would be great. Most of what we know is good guesswork, based on lab experiments and inferences that take many detailed drawings to explain and a lifetime to understand. Fortunately, the more you see, the better things fall into place. <...>

Recent quantitative studies of gneisses in the Laramie Range by Newhouse and Hagner (1947) have resulted in the idea that structure of the host rock is a dominant factor controlling the composition of gneisses and schists. The Sherman granite, which is exposed in the southern part of the Laramie Range (Fig. 1), was selected for a quantitative study for three reasons: (1) a similar study had been made by Newhouse and Hagner on associated gneissic rocks which made it possible to correlate and compare results; {'d) most of the geologic contacts were mapioed previously, and thus nearly all of the field time could be devoted to a study of the granite; and (3) the area is of batholithic dimensions and is readily accessible. The problem was to determine whether any relationship existed between structure and composition of the granite, to explain the significance of any correlation or lack of correlation discovered, and to determine the relation of the Sherman granite to the Raggedtop gneisses studied by Newhouse and Hagner. <...>

О чем говорят камни Карелии рассказывает в своей книге профессор Петр Алексеевич Борисов Рассказывает проникновенно, спокойно, словно беседуя с читателями. И каждая небольшая главка — кусочек его многолетней геологической жизни, полной непрестанных исканий, творческого труда, радости открытий. Когда эта книга издавалась первый раз, профессору Борисову было уже семьдесят пять лет. Из них почти пятьдесят он посвятил изучению геологического строения нашего края. И, пожалуй, нн одному человеку не поведали еще карельские камни так много своих сокровенных тайн. <...>

Abstract—Following a long period of island arc-like orogenic activity, post-orogenic granites of Pan-African age (670-550 Ma) were emplaced throughout the Arabian Shield. Most of these rocks are typical subsolvus calcalkaline biotite monzogranite. The early Pan-African granites are associated with widespread small tholeiitic gabbro intrusions, many of which are layered. The calc-alkaline granites are not evenly distributed and their area of exposure relative to other rock types increases from S.W. to north and N.E. In the north-eastern part of the shield, they are associated spatially with rhyolites of similar composition and with molasse derived from granitic terrane.

The Precambrian crust of Saudi Arabia, the eastern Sudan and Egypt consists of abundant granites and granodiorites, arc-type volcanics, and well-authenticated ophiolites. The metamorphic grade is generally low. Archaean remnants are absent. In contrast, the Precambrian in the Mozambique belt in Kenya and Tanzania consists of high-grade metamorphic rocks, contains much reworked Archaean basement, and few granitic or granodioritic plutons. It is proposed that there is a transition from crust formed by successive accretion of island arc/back arc complexes in the north to products of collisions between plates carrying Archaean continental crust in the south. The collision led to Himalayan-type crustal thickening, deep erosion and isostatic uplift, exposing deep-crustal rocks. <...>

Short courses of mineralogical interest were begun in 1965 in conjunction with the annual meetings of the Geological Society of America. Sponsored by the American Geological Institute Committee on Education and directed by J.V. Smith of the University of Chicago, short courses of feldspars (1965), pyroxenes and amphiboles (1966), sheet silicates (1967), and resonance spectroscopy (1968) were presented by mineralogists with expertise in these subject areas. With each succeeding year the course notes became more comprehensive and formalized, and AGI published these at low cost for distribution in the geological community. Unfortunately, AGI has been financially unable to continue this service. <...>

Известный с давнего времени как первый среди драгоценных кам* ней, алмаз стал ныне одним из важнейших материалов технического прогресса.
В книге рассказывается о строении алмаза и его удивительных физических свойствах, о происхождении этого замечательного минерала, о том, как был осуществлен синтез алмаза, а также о применении алмазов в самых разнообразных отраслях техники и промышленности.
Рассчитана на широкий круг читателей.

Академик Александр Евгеньевич Ферсман (1883—1945) — крупнейший ученый, геолог, глава советских минералогов, один из творцов науки о химии земли — геохимии.
Александр Евгеньевич Ферсман широко известен не только как 'неутомимый исследователь природных богатств нашего социалистического Отечества, но также й как блестящий популяризатор научных знаний. Книга А. Е. Ферсмана «Занимательная минералогия» была написана в 1926 году и еще при жизни автора издавалась двенадцать раз. Она переведена на различные языки народов нашей Родины. Настоящее издание выходит под научной редакцией профессора Ленинградского Горного института Н. К. Разумовского