CYCLOSTRATIGRAPHY OF LOWER PERMIAN -CASE STUDY IN ITARARE GROUp, PARANA BASIN (PART II): EVIDENCES OF ASTRONOMIC FORCING (ORBITAL AND SOLAR) IN CLIMATE AND SEDIMENTATION -The existenceand natureof possibleastronomicforcingof cyclicityin glacialsedimentsof the ItarareGroup,Parana Basin,duringthe Eopermian,were studied in core and gamma ray log data from two wells drilled by CPRM (Companhiade Pesquisa de Recursos Minerais) to coal research,one in Santa Catarina and other in Rio Grande do SuI. The distancebetween the originallocation of the cores (about 380 km) made it possibleto test the astronomicforcing in this deposits in differentlocations of the basin.Two methodsof data sampling were used, accordingto data scaleand the possibleforcing: the gammaray logs were digitizedand sampledat I em intervals, in order to test the presence of orbital forcing (20,000 to 400,000 years) or other forcing phenomena (3,000 to 10,000years), andthe cores were scanned in the intervalswith rhythmites and transformed in gray scale data sampled equally (0,2538 mm), in order to search for annual to centennialcycles.The harmonicanalysis showed cyclicity in both scales: orbital cycles ranging from about 17,000to 100,000years and solar cyclesranging from about 22 to 1,000years. The accumulation time calculatedfor one well in log and core data (about 9,400years for the scannedintervaland about 12,600years for the same intervalin log data) showeda very high correlation. The accumulation rates calculatedfor the log data, ranging from 5,2 to 9,3 cm/ka, are very similarto the Pleistoceneones. The analysisalso showedthat the completesedimentaryrecord of the ItarareGroup for one of the wells corresponds to about half precession cycle (12,342years).As both astronomicforcingphenomenadetected, the solar and the orbitalcycles, affectclimate on a global scale, certainlytheir influence on sedimentation occurred in other locations of the basin.Keywords: cyclostratigraphy, Itarare Group, Lower Permian.Resumo A inducaoastronomica no clima da regiao da Bacia do Parana,durante0 Eopermiano, foi testada com 0 intuito de determinara naturezada ciclicidade presenteem sedimentos do Grupo Itarare,de origem glacial. Utilizaram-se dadosde testemunhos e de perfisde raios gama de dois pOyOS, urn em Santa Catarinae outro no Rio Grandedo Sui,perfuradospela CPRM.A distanciaentre as locacoesdos pOyOS (cerca de 380 km) possibilitou testar a influencia da inducaoastronomicaem localidades distintas. Dois metodos de amostragem foramutilizados, de acordocom a escalados dadose com a possivelinducao: perfisde raios gamaforam digitalizados e amostradosem intervalosde I em, para testara presencados ciclosorbitaisna escalade 20 mil a 400 mil anos, ou fenomenos indutores na escalade 3 mil a 10 mil anos, e os testemunhosforam escaneados nos intervalos com ritmitos e transformados em dados em escala de cinzaequiespacados (0,2538 mm), objetivando a busca por ciclos anuais a centenarios, A analise cicloestratigrafica sugere a presenca dos ciclos orbitais, com perfodosde cerca...