porphyry is an igneous rock containing conspicuous crystals called phenocrysts surrounded by a matrix of finer-grained mineral. <span>both alkali and plagioclase </span>feldspars<span> occur as irregularly shaped grains with only a few or no </span>crystal<span> faces hope it helps</span>
Answer:
higher productivity, but another unit of capital would increase output by less than before.
Explanation:
All of the ancient civilizations were close to a major water source.
All of them practiced agriculture in order to provide enough food for their civilization.
All of them had some sort of irrigaiton in place in order to water down he fields.
All of them lived in socially stratified societies where a ruler was present.
Numerous economic policies that Roosevelt implanted. 1933-1940
