@article{10272/12573, year = {1996}, url = {http://hdl.handle.net/10272/12573}, abstract = {A new integrated analysis of microstructural, metamorphic and U-Pb monazite age data, indicates that the Berzosa-Riaza shear zone (BRSZ) is a major D2 extensional structure associated with crustal-scale ductile extensional shearing and important decompression. Low-P/high-T metamorphism associated with thw D2 event overprints earlier barrovian metamorphic assemblages formedduring the Hercynian D1 compressional event. Qualitatively-derived P-T-t paths suggest that this syncollisional extension in the Somosierra sector of the Spanish Central System was associated with the major extensional collapse of the previously thickened Hercynian crust}, publisher = {Sociedad Geológica de España}, title = {Evolución microestructural y metamórfica de la zona de cizalla extensional de Berzosa-Riaza: la superposición de asociaciones minerales de Baja-P/Alta-T sobre una secuencia Barroviense}, title = {Microestructural and metamorphìc evolution of the extensional Berzosa-Riaza shear zone: the overprint of lower-P/ High-T mineral assemblages over a Barrovian sequence}, author = {Escuder Viruete, Javier and Hernaiz Huerta, Pedro P. and Valverde Vaquero, Pablo and Rodríguez Fernández, R. and Dunning, G. R.}, }