The timing and processes of development of the high topography and high relief of the southern Rocky Mountains of Wyoming, Colorado and New Mexico has been controversial for over a hundred years. This study applies several different methodologies towards understanding the timing and relative importance of the events that uplifted and shaped the…

The Grand Canyon, the natural wonder visited most often in the United States, is explored on foot, on burro, and by boat in this article. Learn about the canyon's different rock layers as well as its erosion, plant life, animal life, and water flow. (JM)

The mysterious darkness of Mammoth Cave in southwestern Kentucky, about 90 miles south of Louisville and 90 miles north of Nashville, has lured travelers to enter and warned them to stay away. From the dawn of time visitors have been awestruck by the cave's size and rugged beauty. This lesson is based on the National Register of Historic Places…

Developed to integrate fundamental oceanographic concepts with basic research, this book presents information about the Pacific Ocean off the coast of Oregon. Characterizations and descriptions of the marine environment from the coastline to approximately 200 miles offshore are provided for the interested public. Chapter topics include: (1) marine…

This unit, one of a series designed to develop and foster an understanding of the marine environment, presents marine science activities for students in grades 7 and 8. The unit, focusing on life in the sea and the physical factors which influence that life, is divided into sections dealing with: (1) the theory of plate tectonics; (2) ocean floor…