Albert Streckeisen [SEP] father
Albert Streckeisen
Albert Streckeisen (8 November 1901 – 29 September 1998) was a Swiss petrographer and petrologist, the son of Basel forensic scientist Adolf Streckeisen.
Biography.
He studied geology, mineralogy and petrology in Basel, Zürich and Berne. He submitted his doctoral thesis on the geology
and petrology of the Flüela group in 1927. In the same year, aged 26, he was called as Professor in Mineralogy and Petrology to the Polytechnic of Bucharest, Romania. As a member of the Romanian Geological Service,
Systematics of Igneous Rocks"
fostered by Albert Streckeisen (whence their alternative name: Streckeisen diagrams).
Geologists worldwide accept the diagrams as a classification of igneous, especially plutonic rocks.
Usage.
QAPF diagrams are mostly used to classify plutonic rocks (phaneritic rocks), but are also used to classify volcanic rocks if modal mineralogical compositions have been determined. QAPF diagrams are not used to classify pyroclastic rocks or volcanic rocks if modal mineralogical composition is not determined, instead the TAS classification (Total-Alkali-Silica