Palynology 



The study of Pollen and other microfossils, especially 

 from deposits in lakes and other bodies of water, to deter- 

 mine the age of strata and the kind of plant life existing 

 in former periods, cf. Paleobotany. 



Pampas 



Extensive grasslands in South America, particularly in 

 Argentina, large portions of which are now cultivated, cf. 

 Prairie, Steppe, Veld. 



Pampero 



A suddenly arising, violent, southwesterly wind on the 

 Pampas of South America, most prevalent from July to Sep- 

 tember. 



Pan 



(1) A layer in the soil that is strongly compacted and 

 indurated, or with a very large clay content, cf. Ortstein. 

 (2) A shallow, basin-like depression without vegetation or 

 outlet for drainage. 



Panclimax 



According to F. E. Clements two or more related cli- 

 maxes that have the same life-form, common genera of dom- 

 inants, and the same general climatic factors, cf. Formation. 



Pandemic 



Refers to something which has a wide occurrence such as 

 a disease. 



Panmixis 



The wide interbreeding of individuals of a population, 

 where each individual has the potential capacity of mating 

 with any other individual. 



Pannage 



The feeding of swine in woods, or the food such as 



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