Answer:
Trenches are not found int he Appalachian mountain province today.
Explanation:
1 is not correct because there is an abundance of metamorphic rocks, which is not weird considering the age of this mountain range.
2 is not correct because this mountain range has been close to intense volcanism during its formation, so it still has some of the volcanic rocks preserved.
3 is not correct because there are a lot of folded and faulted mountain ridges, many of which are visible at the surface today.
4 is not correct because these mountains rose from the ocean, so there are remnants of an ancient floor at places.
5 is not correct because with the erosion over hundreds of millions of years, valleys have been gradually formed at the periphery of this mountain range.
6 is not correct because the top layers of this e range are predominantly made of sedimentary rocks.
7 is correct because the trenches that existed in this area have disappeared a couple of hundreds of millions of years ago, mainly because the area has been gradually moving away from the tectonic boundaries and became an area that is tectonically inactive.
