Geology of the world and the Environment

2021-05-31 04:20:18 What does MOHS SCALE OF MINERAL HARDNESS mean ? Why will we use it? ....... You can find answers to your questions in this linkn

https://www.geologyhere.com/?p=1787

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2021-05-30 11:00:14 WHAT IS WEATHERING?

Weathering is the breaking down of rocks, soil and minerals as well as wood and artificial materials through contact with the Earth’s atmosphere, biota and waters. Weathering occurs in situ, roughly translated to: “with no movement”, and thus should not be confused with erosion, which involves the movement of rocks and minerals by agents such as water, ice, snow, wind, waves and gravity and then being transported and deposited in other locations

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2021-05-25 19:50:50 Handbook of Clay Science, Volume 1

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https://t.me/geominerals/446

The Handbook of Clay Science aims at assembling the scattered literature on the varied and diverse aspects that make up the discipline of clay science. The topics covered range from the fundamental structures (including textures) and properties of clays and clay minerals, through their environmental, health and industrial applications, to their analysis and characterization by modern instrumental techniques. Also included are the clay-microbe interaction, layered double hydroxides, zeolites, cement hydrates, genesis of clay minerals as well as the history and teaching of clay science. No modern book in the English language is available that is as comprehensive and wide-ranging in coverage as the Handbook of Clay Science. Open / Comment

2021-05-25 02:20:42 UNDERSTANDING ETHIOPIA (pdf)

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Understanding Ethiopia is a detailed description of Ethiopia’s geological story and enables non-specialist readers to share the author’s thrill at gaining a deeper insight into the processes which produced, and continue to shape, this amazing country. Ethiopia’s spectacular landscapes, ranging from mountains over 4500m high to salt plains 150m below sea level, are a reflection of the geological processes that formed the country. Indeed, its history and the historical sites, for which it is renowned, are largely determined by geology. Readers learn why and how Ethiopia’s geology is both unique and dynamic, as here the earth’s crust is in the process of breaking apart. Open / Comment

2021-05-22 20:04:03 This book provides a succinct but comprehensive presentation of key geomorphological locations and topics including information about geomorphological heritage and maps to visit the most important sites.

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https://t.me/geominerals/442

Apart from often being remarkably scenic, landscapes reveal stories that often can be traced back in time tens of million years and include unique events. This is particularly true for Ethiopia where spectacular examples of different landforms are present. Its geomorphology varies from highlands, marked by high volcanoes and incised by deep river gorges, to the rift valley lakes endorheic systems and the below sea level lowlands with characteristic landscapes which are unique in the world. Open / Comment

2021-05-15 23:05:33 Types of depositional environments ( PART ONE )

#CONTINENTAL

#Alluvial - type of Fluvial deposite. Caused by moving water in a fan shape (Alluvial Fan) and containing mostly impermeable and nonporous sediments well sorted.

#Aeolian – Processes due to wind activity. Often in deserts and coastal regions and well sorted, large scale cross-beds

#Fluvial - processes due to moving water, mainly streams. Common sediments are gravel, sand, and silt.

#Lacustrine - processes due to moving water, mainly lakes. Common sediments are sand, silt, and clay.

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2021-05-15 00:16:56 GEOLOGY DISCIPLINES ( PART FIVE)

#Tectonics The branch of geology that looks into the study of crust structure, i.e. the whole of deformations that suffer surface rocks, their origin and development. Tectonics discusses structures in a very broad way while structural geology does it in a more detailed way. However, they can be considered as synonyms.

#Palaeontology Geology (and biology) branch that studies past living beings (essentially their fossils), their morphology and way of life. It also establishes their phylogeny and classification. Palaeontology, at the same time, is an important tool for rock dating on the basis of their fossil content.

#Geothermics The branch of geophysics that looks into the study of Earth’s inner heat and temperature, heat sources and thermic properties of materials.

#Gravimetry The branch of geophysics that looks into the study of terrestrial gravity field anomalies and explains its causes associating it to mineral deposits, etc.
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2021-05-15 00:00:47 GEOLOGY DISCIPLINES ( PART FOUR)

#Mineralogy The branch of geology that studies mineral formation and properties and establishes their classification as well as crystallographic structure.

#Petrography The branch of geology that discusses rock description and classification. It is a branch of petrology (that looks into their study in all of the aspects.)

#Petrology The branch of geology that studies rocks, describes them, investigates their origin and establishes a classification, as well as their development through time. This term is broader than petrography.

#Seismology The branch of geophysics that studies earthquakes and their effects as well as the ways of propagation of waves as a tool to study Earth’s inner structure. By extension it studies as well any artificial vibratory phenomenon (for geophysics prospects.)
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