-
481.
Proterozoic
Subjects
Precambrian
-
482.
Pyrometry
Subjects
HeatTemperature measurements
-
483.
Quarries
Subjects
Economic geology
-
484.
Quartz
Subjects
Crystal oscillators
-
485.
Quaternary
Subjects
Cenozoic
-
486.
Radiation
Subjects
PhysicsWavesOptics
-
487.
Radioisotopes in geology
Subjects
Isotope geology
-
488.
Radioisotopes in hydrology
Subjects
Radioactive tracers
-
489.
Rain and rainfall
Subjects
Precipitations (Meteorology)
-
490.
Rain-water
Subjects
Water
-
491.
Rainbow
Subjects
Meteorological optics
-
492.
Reefs
Subjects
Landforms
-
493.
Remote-sensing maps
Genre/Form
Maps
-
494.
Reservoirs
Subjects
Hydraulic structures
-
495.
Rhizosphere
Subjects
Soils
-
496.
Rifts (Geology)
Subjects
Structural geology
-
497.
Right to water
Subjects
Social and economic rights
-
498.
Riparian ecology
Subjects
Wetland ecology
-
499.
River sediments
Subjects
Sediments (Geology)
-
500.
Rivers
Subjects
RunoffNatural areas
-
501.
Rock deformation
Subjects
Structural geologyDeformations (Mechanics)Rock mechanics
-
502.
Rock glaciers
Subjects
Glacial landformsFrozen ground
-
503.
Rock mechanics
Subjects
-
504.
Rocks
Subjects
Geomaterials