petrographer การใช้

• The cash prize, named after American geologist and petrographer Felix Chayes, was established in 1997
• From 1901 to 1911, he was geologist to the Geological Survey of Great Britain and was a petrographer from 1911 to 1935 working for the Geological Survey Department.
• Working in the Lake District, Rutley began to make a special study of rocks and rock-forming minerals, and soon qualified as acting petrographer on the Survey.
• The following year he joined the Michigan State Geologic Survey as a petrographer, and he remained in that post into 1892 while also serving as an instructor at the Michigan College of Mines.
• He served as Lecturer in Petrology at Edinburgh University, and as Petrographer ( 1901 ), Assistant Director ( 1911 ) and Director ( 1920 3 ) of the Geological Survey of Great Britain.
• The famous German mineralogist and petrographer Arnold von Lasaulx, with whom he collaborated, defined Silvestri as 玊he greatest connoisseur of the giant volcano, of the power of its manifestations and of its strength?
• He was assistant in petrography and chemistry of the United States Department of Agriculture 1901 1904, and was a petrographer in the office of public roads and rural engineering of the United States Department of Agriculture from 1904.
• Although his ideas are not accepted by mainstream petrographer, made a presentation to the ICMA ( International Cement Microscopy Association ) in 2007 and gave a paper in which he concludes " we are far from accepting even as a remote possibility of a'manmade'origin of pyramid stones ."
• Dipayan Jana, a petrographer, made a presentation to the ICMA ( International Cement Microscopy Association ) in 2007 and gave a paper in which he discusses Davidovits's and Barsoum's work and concludes " we are far from accepting even as a remote possibility a'man-made'origin of pyramid stones ."