The physical geography of parts of New Mexico and West Texas, including Big Bend National Park are an extension of what

It form an northern extension of Chihuahuan Desert.

Explanation:

The big bend national park is an extension of southwest texas and includes the entire mountain ranges and a large part of the Chihuahuan Desert this desert is the largest desert of North America and consists of various water sources. Forming a part of the physical feature of Mexico and west Texas.

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

How many miles is each lap?