Approximately how many million years ago (mya) was the region around current- day Watertown, New York, located the nearest to the equator​ 1. 270 mya
2. 300 mya
3. 340 mya
4. 450 mya

340 mya

Explanation:

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

a time line cause it goes from 685 to 978