Question

The Baraboo Quartzite is late Proterozoic in age. Approximately how old is this in years BP? Wisconsin has an area of about 54,000 mi and the Baraboo Quartzite is about 1000 ft. thick. If this unit once covered the whole state, what volume in cubic miles is indicated (1 mile = 5280 ft.)? If the quartz in the sandstone was derived from a granite mass containing only 15% quartz, what volume of granite had to be eroded to yield the total Baraboo Quartzite volume? What happened to the rest of the granite mass?

Answer 1

APPs 以.motely. He Bonabop nant리 on to 542 Mallion . As we know this is the G. 54,000 mi2 hiek an- anea Banaboo umtaites about looo =0.189 m This unitonce cownedwhole stude He he vlume în cubic miler indicaded ene. in el 5 . 10Q06 m S. lhe quante Mppo5e te ma contained only 15% d- om a ani Noッ as n'e know quan.tz rde. aem po sed thisquanteite is mainly denived /0m. so nce a nl yeild the total X lo 206 ono is loo 3 a2aboo u

what happened to the rest of granite mass:

the rest of the granite mass had been weathered to produce soil. granite is mainly composed of quartz and feldspar. as we know quartz is very resistant mineral, whereas feldspar is not, it gets affected by chemical weathering easily and converts into clay mineral.