Peridotite is an igneous rock, which means that it was formed after molten lava cooled and solidified. It is composed mostly of olivine (a mineral which, when it is gem quality, is the beautiful peridot found in jewelry) and pyroxene,…
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Schist is a medium grade metamorphic rock following shales, slates, and phylittes, in the rock cycle of metamorphism. Schist means “to split” which is a hallmark of this rock. Schist can be formed from the igneous rock basalt (orthoschists); or…
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Quartzite is a non-foliated metamorphic rock composed in its majority of quartz, and formed from the sedimentary rock sandstone. A metamorphic rock is formed when constituent minerals recrystallize in a new molecular arrangement due to tectonic compression and heating. Quartzite…
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There is scarcely a time that we go out for a drive, camping, fishing, hunting, hiking, or otherwise into the outdoors, that we don’t look for and collect stones or look at and explorer interesting geological features. This has become…
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We are in for a wet spring. The weather patterns establish during a very active weather winter still remain in place. Ample moisture from the gulf collects in Texas meets cold fronts falling from the north west and combine to…
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Bedrock exposures across the majority of Illinois are sedimentary in origin, ranging in age from Cambrian along the LaSalle Anticline near Joliet to scattered outcrops of Cretaceous and Tertiary age at sites along the Mississippi River. Pennsylvanian (Late Carboniferous) rocks…
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The Facts About Blue Diamonds. Diamonds are composed of carbon atoms that have been subject to extreme pressure and heat. If the diamond contains no impurities then the color will be crystal clear. Nature rarely creates anything that does not…
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Will gold glitter in Nigeria?IntroductionRecords of gold occurrences are numerous in literature. Woakes (1988) noted over thirty occurrences (earlier described by other authors) in alluvial terrain, quartz veins, sheared silicifed conglomerate.Chukwu (1988) discussed the distribution of gold mineralization in the…
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The core and mantle. The core and mantle together make up the main body of the earth. except from the upper mantle they are to deep to be studied with direct tests. This means that our understanding of them has…
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Discovery and definition of sedimentary exhalative mineralization enhances lead-zinc-silver resources in the Benue Trough, NigeriaIntroductionOccurrences of lead, zinc, silver and barites have been recorded in parts of the Benue Trough [Abakaliki, Ishiagu, Arufu/Akwana areas]. Useful contributions include McConnel 1957, Pargeter…
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