Winkel tripel projection of the Earth's surface Laminated Graded series of maps addresses unique needs of students as they advance their understanding of the United States and the world United States map includes Key to Features guide at the bottom World Map includes a cross-section of the Earth showing the highest peaks and lowest trenches Grades 6 to 12 Measures 51 × 37 in
Covers the principle of original horizontality, the law of superimposition, the principle of faunal succession, geological time charts, index fossils and both relative and absolute dating