Which Types Of Rocks The Law Of Crosscutting Relationships Involves? The law of cross cutting is the logical assumption that a magma protrusion that cuts through horizontal layers at a diagonal or vertical is younger than the layers that it cuts through. Sedimentary rocks are most often found in horizontal or near horizontal layers or
Why Is Evidence From The Precambrian Rare? Fossils are rare in Precambrian rocks mostly because Precambrian life-forms lacked bones, or other hard parts that commonly form fossils. One of the few Precambrian fossils that have been discovered are stromatolites. Why are Precambrian fossils rare? Fossils are rare in Precambrian rocks, probably because Precambrian life-forms lacked
Are Rocks Constantly Cycling And Changing? Most changes happen very slowly; many take place below the Earth’s surface, so we may not even notice the changes. Although we may not see the changes, the physical and chemical properties of rocks are constantly changing in a natural, never-ending cycle called the rock cycle Does the rock
What Was The True Age Of The Earth Found To Be And Who Was The First Person? An age of 4.55 ± 0.07 billion years, very close to today’s accepted age, was determined by Clair Cameron Patterson using uranium–lead isotope dating (specifically lead–lead dating) on several meteorites including the Canyon Diablo meteorite and published in
What Did Marine Fossils Discovered On A Canadian Mountaintop Tell Scientists? Method used to determine the most accurate age of Earth’s oldest rocks. Years of the history of Earth that geologists study. What did marine fossils found on a Canadian mountaintop tell scientists? Rocks on the mountaintop were once below the ocean’s surface. What do