-
457.
Periglacial processes
Subjects
Geomorphology
-
458.
Permian
Subjects
Paleozoic period
-
459.
Petrofabric analysis
Subjects
PetrologyRocksTectonics
-
460.
Petrogenesis
Subjects
PetrologyRocks
-
461.
Petroleum geology
Subjects
GeologyProspecting
-
462.
Petrology
Subjects
GeologyRocks
-
463.
Phanerozoic Eon
Subjects
Geochronology
-
464.
Phenology
Subjects
BioclimatologyPlant ecology
-
465.
Phosphate rock
Subjects
Sedimentary rocks
-
466.
Phytoliths
Subjects
Plant cell wallsFossil plants
-
467.
Plains
Subjects
Landforms
-
468.
Planetary geology
Subjects
Geology
-
469.
Plate tectonics
Subjects
-
470.
Platinum ores
Subjects
Minerals
-
471.
Pleistocene
Subjects
Quaternary
-
472.
Pliocene
Subjects
Neogene
-
473.
Plutonic rocks
Subjects
Igneous rocks
-
474.
Pluviometry
Subjects
-
475.
Porphyry
Subjects
Igneous rocks
-
476.
Precambrian
Subjects
Geochronology
-
477.
Precious stones
Subjects
Minerals
-
478.
Precipitations (Meteorology)
Subjects
MeteorologyWeather
-
479.
Prehistoric anthropology
Subjects
Prehistoric manPrehistory
-
480.
Primates, Fossil
Subjects
Fossil mammals