Which region was tectonically active during the cenozoic era?

Explanation:

Western North America has been active during the Cenozoic Era. The Rocky Mountains formed during this phenomenon.

Huge basins framed alongside the mountains that were loaded up with almost three kilometers of dregs from the dissolved mountain land.

what are local authorities doing to fix the problem

explanation:

what are local authorities doing to fix the problem

i also think he is correct. i believe they came to washington to protest their rights.