- Tytuł:
- When Was Grand Canyon Carved--Millions of Years Ago or Thousands of Years Ago? How Do We Know?
- Autorzy:
- Temat:
- SOIL erosion
- Źródło:
- Reports of the National Center for Science Education; Jul/Aug2015, Vol. 35 Issue 4, p1-8, 8p
- Terminy geograficzne:
-
GRAND Canyon (Ariz.)
COLORADO River Valley (Colo.-Mexico) - Czasopismo naukowe