Anatomy of a Continent - Lesson 20 - Part 3 of 6

Planet of Man Series -- Shield of Plenty Starring; Tuzo Wilson -- renowned geophysicist Anatomy of a Continent - Lesson 20 - Part 3 of 6 Planet of Man -- Shield of Plenty •Geological exploration team analysing Precambrian rock in Northwest territories •Differences between Archean and Proterozoic rock types are important. •Precambrian rocks of the Grand Canyon a layer above the Precambrian is missing?? •Sedimentary rock was once thought the oldest rocks on earth •Elliot lake ores discussed by David Pearson -- sedimentary rock Brannierite ores are Precambrian time. •No oxygen in the Precambrian Evidence of life in the Precambrian -- Stromatolite • Formation of the atmosphere in early time •Geologists collecting rock samples in the Precambrian shield preparing to leave •Fossils are few in Precambrian •More information needs to be found about Precambrian although still hunting for minerals in the Precambrian will always exist