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Posts Tagged "Stratigraphy"

History of Geology

A Geologist´s Dream: The Lost Continent of Lemuria

SCLATER_1899_Aye_Aye

“Yet if hope has flown away In a night, or in a day, In a vision, or in none, Is it therefore the less gone? All that we see or seem Is but a dream within a dream.” “A Dream Within A Dream” by Edgar Allan Poe (1809-1849) There is lot fuzz about the discovery [...]

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History of Geology

Geologists in the land of the Kangaroo: The first (and forgotten) geological Exploration of Australia

BRESSAN_expedition_Baudin

April 19, 1770 British Captain James Cook reached for the first time the south-eastern coast of Australia. The continent of Australia had been “discovered” by Europeans already in 1606, but only in 1642 the size of the new “island” was realized. However the first geological descriptions of the new continent happened only at the beginning [...]

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History of Geology

March 30, 1759: The Four Layers of Earth

ARDUINO_1758_Stratigraphy

In a letter dated to March 30, 1759 the Italian mining engineer Giovanni Arduino (1714-1795) proposed to the physician and fossil collector Prof. Antonio Vallisnieri the subdivision of earth’s crust in various classes of rocks. Based on his observations along the foothills of the Alps, Arduino recognized a stratigraphic column with 4 classes: unstratified or [...]

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History of Geology

March 23, 1769: William Smith – Pioneer of Applied Geology

SMITH_1815_Geological_map_Britain

“William Smith Never saw a coccolith But using macrofossil data He ordered all the English strata” An anonymous clerihew dedicated to W. Smith William Smith, born March 23, 1769, introduced in his “Strata – Identified by organized Fossils” (1816) the “principle of faunal succession” into stratigraphy. Geological maps before Smith mapped and catalogued rocks based [...]

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History of Geology

Darwin’s Tree and Deep Time

“Geologising in a Volcanic country is most delightful,…[]” Geologist Charles Darwin in a letter to his father Darwin is today remembered for his gradualistic view of earth’s history, an essential prerequisite for his view of life, as he concludes in 1859 ” from so simple a beginning endless forms most beautiful and most wonderful have [...]

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History of Geology

Mass Extinctions and Meteorite Impacts

BRESSAN_RAUP_Killcurve

The flyby of asteroid 2012 DA14 and especially the past and present Russian meteors are impressive reminders that the terrestrial biosphere can be affected also by extraterrestrial forces. However contrary to headlines by the general media the connection between mass extinctions and large meteor impacts is still poorly understand. The Scaglia Variegata and Scaglia Cinerea [...]

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History of Geology

Geologizing with Darwin

BRESSAN_2013_Geologizing_ Darwin_Map

“Therefore on my return to Shropshire I examined sections and coloured a map of parts round Shrewsbury.” Darwin in his autobiography (1876) “A map is always a decisive criterion of they who aspire to the rank of geologists [E]very one who has not compiled a map, wants the necessary talent of combination . The spirited [...]

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History of Geology

Geomorphologic Groundhog Day

BRESSAN_Marmota_marmota

We don’t know how much wood a woodchuck would chuck if he could chuck wood, but we know how much sediment he moves per year… Biogeomorphology, also referred as ecogeomorphology or sometimes as zoogeomorphology, is the study of the linkages between ecology and geomorphology, or in simple terms between life forms and landforms. Such two-way [...]

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History of Geology

Men among prediluvian Beasts

ACER

“No subject has lately excited more curiosity and general interest among geologists and the public than the question of the Antiquity of the Human Race…[]” Lyell 1863 The debate over the age of the earth generated an even more intriguing question: how old is humankind? Written records date back some thousands of years, but geological [...]

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History of Geology

Tsunami in the Geological Record

The tsunami of Indonesia 2004 and Japan 2011 showed that they are a common element associated with earthquakes. Modern databases list more than 2.000 tsunami events worldwide in the last 4.000 years, most of them recorded in historic documents, chronicles and even myths – and yet tsunami deposits in the geological record seem to be [...]

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