The walls of the grand canyon are made of layers of sandstone. a dike cuts across some of the layers. when did the dike form? after erosion revealed the canyon wall at the same time as the sandstone formed and the canyon was eroded after the sandstone formed and before erosion revealed the canyon wall before the sandstone formed

Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?

Which nation is home to the bass rock in the firth of forth?