Geobulletin alpha

Source info:

Author:	Michael J. Ryan, Ph.D.
Date:	2015-03-30 19:02:00
Blog:	Palaeoblog
URL:	http://palaeoblog.blogspot.com/2015/03/geological-eras-first-proposed-1759.html

Summary:

Geological Time ScaleIn 1759, Italian geologist Giovanni Arduino (1714-1795) dated a letter to Professor A.Vallisneri the younger, in which Arduino proposed a classification of Earth's surface rocks according to four brackets of successively younger orders: Primary, Secondary, Tertiary and Quaternary. These are the four geological eras used today. The volcanic rocks without fossils which he saw

Content analysis:

Stratigraphic context:

Recognized stratigraphic terms [n]:	Quaternary [1] Tertiary [1]
Agenames chronostratigraphy [rating]:	Quaternary [0.1] Neogene [0.1] Paleogene [0.1] Cenozoic [0.67] Phanerozoic [0.67]

Geographic context:

Location	Country	Latitude	Longitude
Italy	IT	42.5038	12.5735

Keywords:

Arduino, brackets, classification, Eras First Proposed, fossils, geological eras, Geological Time ScaleIn, Italian geologist Giovanni, letter, Professor A.Vallisneri, Quaternary, surface rocks, Tertiary, volcanic rocks, younger orders