which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble?

Ibelieve it was because of the gas act in order to preserve fuel 

Yes there is faults near and around salt lake city. the oldest rock is the darker rocks. also it is a geologic map.i hope this !

Ithink the answer is ,temperature,pressure, and chemical changethey are identified by texture,streak,and locationthere are three ways that metamorphic rocks can form contact, regional,and dynamic metamorphism good luck, all this came right outta of the book

The first immigrants to settle in what is now the united states were the ancient ancestors of modern native americans. the precise routes of those first north american immigrants are disputed, but there is no uncertainty about the fact that every human being on the continent is either a recent immigrant or a descendant of earlier immigrants. since the first immigrants came here from asia more than thirteen thousand years ago, there have been four large and easily recognizable modern waves of immigrants into the united states.