000			03306nam a2200577 a 4500
999			_c136441 _d136441
003			CR-TuBCO
005			20230430065113.0
007			ta
008			141127t1982 xxu||||| |||| 00| 0 eng d
040			_aCR-TuBCO _bspa _cCR-TuBCO
041			_aeng
100			_949060 _aBirdsey, Richard A.
245			_aThe forest resources of Puerto Rico
260			_aNew Orleans, Louisiana (EUA) _b: United States Department of Agriculture _c1982
270			_aSan José, C.R.
300			_a59 páginas _b: 9 ilustraciones, 9 tablas
490			_aResource Bulletin _vSO-85
504			_aBibliografía páginas 31-33
520			_aPuerto Rico is the eastern-most acd smallest of the Greater Antilles and is situated between 18°31’ and 17°55' N latitude and 65°37’ and 67°17' W longitude. The main island, about 160 kilometers long and 55 kilometers wide, occupies about 8,900 square kilometers including the offshore islands of Vieques, Culebra and Mona. The small mountainous island, lying directly in the path of the easterly tradewinds, shows a remarkable diversity in its physical environment (Pico 1974). The interrelations of local geology, physiography, climate, and soils influence the structure and composition of the forests. Nearly all forest areas have also been heavily influenced by man. The geologic history of Puerto Rico began more than 100 million years ago during the Cretaceous period. A geosyncline elongated through the Antillean region, and active volcanism occurred until near the end of the Middle Eocene epoch, giving rise to predominantly submarine accumulations of volcanic rocks (Beinroth 1969). Limestones originated along with tuffaceous shales at this time. Extensive faulting and folding then occurred, accompanied by the emerging plutonic rocks which are now found in the vicinity of San Lorenzo and Utuado. The serpentine found in southwestern Puerto Rico probably intruded during the Cretaceous period. Later during the Middle Oligocene to Middle Miocene epochs, younger Tertiary limestones were formed. Slight uplift and tilting followed, about 15 million years ago.
650			_9162017 _aRECURSOS FORESTALES
650		0	_aMADERA _9133837
650			_9168593 _aVOLUMEN
650			_9154288 _aMEDICION
650			_9137963 _aBIOMASA
650			_9145225 _aECUACIONES ALOMETRICAS
650		0	_aAGRICULTURA _94
650			_9167870 _aUTILIZACION DE LA TIERRA
650		0	_9158995 _aPLANTACIONES FORESTALES
650		0	_9147679 _aFAUNA SILVESTRE
650		0	_9140703 _aCLIMA
650		0	_9149094 _aGEOLOGIA
650		0	_9168152 _aVEGETACION
650		0	_9148317 _aFOREST RESOURCES
650		0	_aWOOD _9168689
650		0	_aVOLUME _9343077
650		0	_aMEASUREMENT _9154228
650		0	_aBIOMASS _9137969
650		0	_aFORESTS _9148332
650		0	_aLAND USE _9152641
650		0	_aFOREST PLANTATIONS _9319603
650		0	_9343266 _aWILDLIFE
650		0	_aCLIMATE _9140716
650		0	_aGEOLOGY _9149107
650		0	_aVEGETATION _9342583
651			_aPUERTO RICO _928689
700			_9130781 _aWeaver, Peter L. _c (autor/a)
710			_918872 _aUnited States Department of Agriculture, New Orleans (EUA) _b. Forest Service
856			_qpdf _uhttps://www.srs.fs.usda.gov/pubs/rb/rb_so085.pdf _yeng
942			_2z _cDIG