ESSE 1010 Lecture Notes - Lecture 13: Erosion Surface, Metamorphic Rock, Nonconformist

• School: York University
• Department: Earth, Space Science and Engineering
• Course: ESSE 1010
• Professor: Gary Jarvis

Document Summary

Need the ratio p0/p, but p0 cannot be measured. Recall that d = p0 p p0 = p + d. Equation becomes t = (1/ ) ln [(p+d)/p] P0 p t=0 t1 t2 t3 (now) t = time since d = 0. The age of a rock is the time since it was last solidified. Ar gas bubbles to surface + escapes into atmosphere: sets d = 0. This technique is good for igneous rocks but doesn"t work for sedimentary rocks. Sedimentary rocks are dated by using igneous rocks which are above or below the sedimentary rocks. Radioactive dating for rocks only applies to igneous rocks. not useful. Radiometric dating is only applicable igneous rocks i. e. rocks solidify from the. Erosion wears down igneous rocks and deposits sediments in low lying regions molten state. elsewhere sediments erosion deposits. Relative ages of rocks: refers to sedimentary rocks.