if this construct is so weak that its about to collapse afterwords, why does it stay in shape when the magmatic pressure is at maximum? Shouldn't it explode to a big crater (not sure if this is translated right)
Not that I know of. Usually the rocks are examined to see what the composition is for example. If the rocks inside and outside are volcanic then it's probably a colder a and more research is done. If the rocks have shatter cones in them, or if there's coesite and stishovite then it's an impact Crater. These features only form during impact events. Coesite for example is found in the mantle, but it only forms below a depth of 300 kilometers. The amount of pressure needed for coesite to form can't be found in the first 300 kilometers below the surface. So you'll only find it below 300 kilometers.
yes, taal volcano's old crater from the horn of tagaytay which looks like an old remain of ancient taal volcano but if it was then when it started smoking in january the whole volcano would be covered in smoke or one of the old craters smoke or a new crater is formed
