Talc – Gypsum – Calcite – Fluorite – Apatite – Feldspar – Quartz – Topaz – Corundum – Diamond - “Mohs Scale of Mineral Hardness ” should be familiar to rock-hounds and earth-science students alike, as it lists common minerals in the order of relative hardness (talc as the softest and diamond as the hardest [...]
“Suddenly I heard a noise as of thunder, which I thought to be that of a wave of the sea. The trees shook, and the earth was moved. I uncovered my face, and I saw that a serpent drew near……his body was as overlaid with gold, and his colour as that of true lazuli….… it [...]
A new disaster movie, retelling the fate of the ancient town of Pompeii, will be released soon. The filmmakers spent six years researching the volcanic disaster that destroyed the town to make it as historically accurate as possible – but what about the geology?
Island on Fire: The extraordinary story of Laki, the volcano that turned eighteenth-century Europe dark By Witze, A. & Kanipe, J. PROFILE-BOOKS 224 pages | Hardcover 1st edition | April 2014 ISBN 978-178125-0044 Volcanoes are no unusual sight on Iceland and yet the eruption that started June 8, 1783 in the southern district of [...]
It’s probably one of the most famous volcanic eruptions of all times – the 79 A.D. eruption of Mount Vesuvius – so may it surprises that the exact day of this historic event is unknown.
September 7, marks the anniversary of the publication of an important paper, “Magnetic Anomalies Over Oceanic Ridges” (1964) describes the discovery of parallel stripes of magnetized igneous rocks along the ocean floor.
The west coast of the U.S. is not only characterized by earthquakes and related myths, but also by volcanoes and also these natural phenomena became incorporated in supernatural stories.
“Hence the saying: If you know the enemy and know yourself, your victory will not stand in doubt; if you know Heaven and know Earth, you may make your victory complete.” The Art of War, by Sun Tzù In 1863, after more than two years of Civil War, the Confederate Army of Northern Virginia launches [...]
August 21, 1986 was a busy market day in the village of Lower Nyos (Cameroon) and most people that evening went to bed early. At 9:30 p.m. a strange sound, like a distant explosion, was heard and suddenly people and animals tumbled onto the ground.
The project unexpectedly struck a pocket of magma and decided not to plug the hole with concrete
“Some say the world will end in fire, Some say in ice. From what I’ve tasted of desire I hold with those who favor fire. But if it had to perish twice, I think I know enough of hate To say that for destruction ice Is also great And would suffice.” Robert Frost (1874-1963) The [...]
In 1820 the Italian engineer Count Giuseppe Marzari-Pencati (1779-1836) published a short article about the stratigraphic succession found near the small village of Predazzo.
Many small eruptions over the past decade or so have helped restrain climate change
The prevailing geological model of the early 19th century was characterized by an almost static earth, maybe slowly cooling and shrinking, until the molten interior would eventually be completely frozen and solidified.
Alpine-Type Fissures, fissures filled often with large and beautiful crystals of Quartz, Plagioclase, Rutile , Amphibole and even Gold, are – according to Alpine folklore the treasure chambers of dwarves – but how these treasures formed is even more fascinating than legends could figure out… Soon after the basic principles of the succession of rocks [...]
“Inside the globe [there] exist mysterious forces, whose effects become apparent on the surface. Eruptions of vapors, glowing lava and new volcanic rocks…” Alexander von Humboldt At the end of the 19th century and after the victory of “Plutonism” in the great Granite War, geologists accepted the idea that igneous rocks originate from deep inside [...]
The landslide of Köfels (named after a small village in Tyrol) is one of the largest recognized landslides in the Alps – large enough to dam up a 92 meters (300 feet) deep prehistoric lake and divide in two the valley of Ötz.
September 8, 1762 the young son of the Yolle‘s, herding the flock of sheep, disappeared near the village of Laval in the province of Dauphiné (France).
“With regard to precipitous heights, if you are beforehand with your adversary, you should occupy the raised and sunny spots, and there wait for him to come up.” The Art of War, by Sun Tzù The battleground of Gettysburg was shaped by ancient tectonic movements, sediments transported by rivers and deposited in lakes and finally [...]
The new movie “Pompeii” reconstructs one of the most famous volcanic eruptions in history with unprecedented “3D” special effects – but even the best visuals can’t help if the science is wrong – so how geological accurate is the movie?