What major catastrophe would make mountains fall?

Question

Every mountain moved or removed from place. Any ideas, earthquake? If so what magnitude, any other scenarios?

Answer 1

An immense volcanic eruption. The key example in the US is Crater Lake in Oregon. Before about 8,000 years ago, Mt. Mazama was one of the highest peaks in the Cascades, over 12,000 feet. After the eruption the highest remaining point is about 8,000 feet, and most of the former peak was deposited as volcanic ash over an immense area in the Pacific Northwest and beyond. A smaller example of the same process occurred when Mt. St. Helens exploded.

Answer 2

i would have to geuss an earthquake probably a 10.0 but i don't know

Answer 3

It would take a monstrous earthquake.  I doubt that could do it.  However, some volcanic eruptions have been so huge that the entire mountain collapsed into the sea, for instance the eruptions of Krakatau (sometimes called Krakatoa) in 416 AD and in 1883, in one of the largest eruptions in recent time.  The entire mountain collapsed into the sea.

The renowned volcano Krakatau (frequently misstated as Krakatoa) lies in the Sunda Strait between Java and Sumatra. Collapse of the ancestral Krakatau edifice, perhaps in 416 AD, formed a 7-km-wide caldera. Remnants of this ancestral volcano are preserved in Verlaten and Lang Islands; subsequently Rakata, Danan and Perbuwatan volcanoes were formed, coalescing to create the pre-1883 Krakatau Island. Caldera collapse during the catastrophic 1883 eruption destroyed Danan and Perbuwatan volcanoes, and left only a remnant of Rakata volcano. This eruption, the 2nd largest in Indonesia during historical time, caused more than 36,000 fatalities, most as a result of devastating tsunamis that swept the adjacent coastlines of Sumatra and Java. Pyroclastic surges traveled 40 km across the Sunda Strait and reached the Sumatra coast. After a quiescence of less than a half century, the post-collapse cone of Anak Krakatau (Child of Krakatau) was constructed within the 1883 caldera at a point between the former cones of Danan and Perbuwatan. Anak Krakatau has been the site of frequent eruptions since 1927. (Description from the SI/USGS)

Answer 4

well, maybe an avalanche....cuz its basically parts of mountains falling....but that's probably not what ur looking for