The lowest layer of the atmosphere is called the troposphere. It ranges in thickness from 8km at the poles to 16km over the equator. The troposphere is bounded above by the tropopause, a boundary marked by stable temperatures.Above the troposphere is the stratosphere.he troposphere is denser than the layers of the atmosphere above it (because of the weight compressing it), and it contains up to 75% of the mass of the atmosphere. It is primarily composed of nitrogen (78%) and oxygen (21%) with only small concentrations of other trace gases.
Bigler is a census-designated place located in Bradford Township, Clearfield County in the state of Pennsylvania.
McKean County, Pennsylvania. McKean County is a rural county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 43,450. Its county seat is Smethport. The county was created in 1804 and organized in 1826. It was named in honor of former Pennsylvania Governor and Declaration of Independence signer Thomas McKean. McKean County comprises the Bradford, PA Micropolitan Statistical Area. It is in a sparsely populated region known as the Pennsylvania Wilds, including the Allegheny National Forest and borders New York.