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.
Sponsored Topics. Irvona is a borough in Clearfield County, Pennsylvania, United States. The population was 680 at the 2000 census. Irvona is located at 40Â°46â²25â³N 78Â°33â²9â³W / 40.77361Â°N 78.5525Â°W / 40.77361; -78.5525 (40.773516, -78.552552).