Glossary beginning with P
- Pahoehoe
- Paleobathymetry
- Paleobiogeography
- Paleoceanography
- Paleocene
- Paleoclimate
- Paleontology
- Paleozoic Era
- Palustrine
- Palynology
- Pangaea
- Paradox Formation
- Passive Margin
- Pathogen
- Paved apron
- Pegamite
- Pelagic
- Pelite
- Pennsylvanian
- Percolation
- Permeability
- Permeable subgrade
- Permian Era
- Permineralize
- Petrified Wood
- Petroglyph
- Petrology
- Petrophile
- Phaneritic
- Phanerozoic Eon
- Phenocryst
- Phlogopite
- Phosphorus
- Photic zone
- Phreatic eruption
- Phreatomagmatic eruption
- Phyllite
- Phytoplankton
- Phytoremediation
- Pictograph
- Pinnaccle
- Placoderms
- Plagioclase
- Plankton
- Planktonic
- Plateau
- Playa
- Pleistocene
- Plinian eruption
- Pliocene
- Pluton
- Plutonic Rock
- Pluvial Lake
- Point bars
- Pool-riffle
- Porcupine
- Porosity
- Post Caldera
- Postglacial
- Prairie Dog
- Precambrian
- Predation
- Prescribed fire
- Preservation
- Pronghorn
- Propagule
- Proterozoic Era
- Protist
- Protohistoric Era
- Provenance
- Provenience
- Pumice
- Pupae
- Pyrite
- Pyroclastic
- Pyroclastic Eruption
- Pyroclastic flow
- Pyroclastic rock
- Pyroxene
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