ADVERTISEMENT
  About the SA Blog Network

Posts Tagged "Stratigraphy"

History of Geology

June 6, 1944: The Geology of D-Day

Into the Jaws of Death, by Robert F. Sargent (1944)

June 6, 1944 – in planning for D-Day – also geology was considered, as aerial photographs of the shores of Normandy were studied to find suitable landing sites for the invasion. The confluence of larger rivers with the English Channel between the harbors of Le Havre and Cherbourg created sandy shorelines were a landing with [...]

Keep reading »
History of Geology

Baron Cuvier and the Question How Mummies Could Evolve

Toth_Hunefer_Papyrus

“Every one has heard of the Ibis, the bird to which the ancient Egyptians paid religious worship; which they brought up in the interior of their temples, which they allowed to stray unharmed trough their cities, and whose murderer, even though involuntary, was pnished by death; which they embalmed with as much care as their [...]

Keep reading »
History of Geology

A Concise History of Geological Maps: The Harmony of Colors

CHARPENTIER_1778_Mineralogische_Geographie

The first maps used symbols to characterize single outcrops; later maps introduced shaded areas to display the distribution of specific rock-types, but due the high printing-costs these maps were printed only in black & white, making them hard to read. Maybe the first colored map was hand drawn by the German mineworker and later mine [...]

Keep reading »
History of Geology

A Concise History of Geological Maps: Mapping Noah’s Flood

BRETZ_1919_Spokane_Flood

Sometimes a geological map supports an intriguing idea not by showing the rocks that are there, but by showing the rocks that aren’t there anymore, eroded by a flood of biblical proportions. “No one with an eye for land forms can cross eastern Washington in daylight without encountering and being impressed by the “scabland.” Like [...]

Keep reading »
History of Geology

A Concise History of Geological Maps: From Outcrop to the first Map

March 23, 1769 marks the birthday of pioneering stratigrapher William Smith, who is also credited with creating the first useful geological map, however like many other great accomplishments also Smith’s idea of depicting the distribution of rocks on a topographic map didn’t materialize out of nowhere. The German mining engineer Georgius Agricola (1494-1555) dedicated in [...]

Keep reading »
History of Geology

The Man who made Mountains

WILLIS_1891_Mechanics_Appalachian_wax_folds

U.S.G.S. engineer Bailey Willis († February 19, 1949) was known for his unorthodox approach to geological questions. Puzzled by the geological structures he discovered in mountain ranges, long before computer-models were available, he constructed a machine to simulate the mountain-forming process. In a box with a moveable piston he folded and crushed layers of beeswax [...]

Keep reading »
History of Geology

Landslides in a Changing Climate

BRESSAN_Beware_of_the_Rockfall

A video showing the aftermath of a rockfall in South-Tyrol remembers us that even small mass movements can have disastrous – or even deadly – effects.   Very large rockslides are rare but very dangerous events that can have catastrophic effects on entire human settlements. One of the greatest disaster of this kind happened in [...]

Keep reading »
History of Geology

Of Mountain Building and Dwarven Treasures

Postcard_Dwarves_Garnet

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 [...]

Keep reading »
History of Geology

Fire burn, and cauldron bubble… Newton’s Philosopher’s Stone

BRESSAN_Argentum_Arsenic

“the magisterium, our great work, the stone” “The Alchemist” Act 1. Scene 4 4. – The Philosopher’s Stone Today we remember Sir Isaac Newton (1642-1727) for his contributions to optics, mechanics and astronomy, but as a typical scholar of his time he was also interested in more obscure knowledge, like provided by alchemy. Dedicating himself [...]

Keep reading »
History of Geology

Granite Wars – Episode I: Fire & Water

WITH_1874_L_Ecorce_terrestre

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. At the “Canzoccoli” -outcrop Pencati observed a grayish granitic rock overlying white marbles. What today is described in any geological textbook as an “unconformity” was at the time a geological impossibility. [...]

Keep reading »

More from Scientific American

Scientific American Dinosaurs

Get Total Access to our Digital Anthology

1,200 Articles

Order Now - Just $39! >

X

Email this Article

X