Noah’s Flood is the key to explaining most of the geological record and as such it washes away millions of years.
https://answersingenesis.org/geology/basic-geology-disproves-creationism/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+AIGDaily+%28Answers+in+Genesis+Daily+Articles%29
* an article * Geology.com * 1 * 2 * 4 * binds the sediment into a rock * washes away millions of years * Grand Canyon