Grand Canyon is younger than geologists think

"Also, there are no age-old erosion marks between the layers of sedimentary rock, indicating that the layers of rock were deposited there simultaneously."This is clearly false as well. There are several disconformities betwewen sedimentary layers, but the most telling is the blatantly obvious angular unconformity separating pre-Cambrian from Cambrian rocks where the pre-Cambrian strata are not horizontal but are overlain by horizontal bedding.Furthermore, if they were all deposited "simultaneously" then why do we see limestones interbedded with desert sandstones?[This message has been edited by MechanicalBliss, 04-21-2003]