The Scythians are not considered as a single ethnic group, but instead as a confederation of multiple ethnic groups that had the same way of life, and adopted the same cultural traits. They were the dominant force for a long time in the Eurasian steppes, and at their pick they controlled a territory from the northern part of modern day Bulgaria to the western part of modern day Mongolia. These people were well known as nomads and as fierce warriors on horses. Their basis was probably in the north and eastern Iranian tribes, and as they were becoming more influential and stronger Mongolian tribes and maybe even some ancestors of the Turkic tribes were incorporated on the east, as well as Caucasian people and probably the ancestors of the Slavic people on the west.
Texas is divided into four regions. North central plains are a region of Texas which is largest region. There is a bed of rocks known as Caprock below the soil. Caprock prevents the flow of any water or oil from below and these does not reach the soil. These rocks are harder and more resistant type of rocks.