URI
Notation
551.1/.4
Caption
General geology
Broader class
551  General geology. Meteorology. Climatology. Historical geology. Stratigraphy. Palaeogeography
Narrower classes
551.1General structure of the Earth
551.2Internal geodynamics (endogenous processes)
551.3External geodynamics (exogenous processes)
551.4Geomorphology. Study of the Earth's physical forms