Tectonosomes and Olistostromes in the Argille Scagliose of the Northern Apennines, Italy

by Pini, Gian Andrea

• ISBN13: 9780813723358
• ISBN10: 0813723353
• Format: Paperback
• Copyright: 1999-09-01
• Publisher: Geological Society of Amer

Table of Contents

Abstract	1	(1)
Introduction	1	(2)
Structural setting of the Ligurian units in the Northern Apennines	3	(5)
Major units and structures	6	(2)
Ligurian nappe	7	(1)
Epiligurian successions	7	(1)
Other structural units	7	(1)
Compressional history	8	(1)
Controversy regarding the argille scagliose and olistostromes	8	(2)
Criteria for field-to map-scale distinction of tectonosomes and olistostromes in the argille scagliose of the Bologna Apennines	10	(9)
Mesoscopic characteristics	11	(3)
Tectonosomes	11	(1)
Olistostromes	12	(2)
Microscopic to mesoscopic characteristics	14	(1)
Mappable characteristics, original stratigraphy, present stratigraphy	14	(2)
Tectonosomes	14	(2)
Olistostromes	16	(1)
Etymology and usage of the terms	16	(3)
Tectonosomes	16	(3)
Olistostromes	19	(1)
Stratigraphy and setting of tectonosomes, olistostromes, and related Epiligurian deposits in the Bologna Apennines	19	(4)
Stratigraphy of tectonosomes and Ligurian olistostromes	19	(1)
LC units of tectonosomes	19	(1)
UCE units of tectonosomes	20	(1)
Tectonosomes as a tectono-stratigraphic unit from a single Ligurian sequence	20	(1)
Ligurian olistostromes	20	(1)
Stratigraphy of the Epiligurian deposits	20	(1)
Stratigraphy of the Epiligurian olistostromes	21	(1)
Normal stratigraphic units associated with the olistostromes	21	(1)
Structural setting of the Bologna Apennines	21	(2)
External structural belt	21	(1)
Internal structural belt	21	(2)
Tectonosomes	23	(23)
Stratal disruption in UCE units	23	(5)
UCE2 Unit	23	(1)
UCE1 Unit	23	(2)
Mechanisms of mesoscopically ductile deformation	25	(3)
Stratal disruption in LC units	28	(15)
Macroscale to mesoscale observations	29	(1)
Mesoscale observations	29	(5)
Microscale observations: The scaly fabric of the matrix	34	(3)
Interpretation of microscale to mesoscale structures in the LC units	37	(5)
Relationships between the microscale to mesoscale and the mesoscale to macroscale structures in the LC units	42	(1)
Structural interaction among the tectonosome units	43	(1)
Structural evolution of the tectonosomes	43	(2)
LC units	43	(2)
UCE units	45	(1)
Relationships of UCE and LC	45	(1)
Regional meaning of the tectonosome structures	45	(1)
Lozenge shape in tectonosomes: Shear lenses from macroscale to microscale	46	(1)
Olistostromes	46	(15)
Epiligurian olistostromes (EO)	49	(3)
Texture	49	(1)
Composition and origin of the clasts	50	(1)
Disposition	51	(1)
Ligurian olistostromes	52	(1)
Texture	52	(1)
Composition	52	(1)
Disposition and setting	52	(1)
Romagna-Umbria olistostromes	53	(1)
Visignano-Bordignano olistostrome	53	(1)
Ca Nova Pagliarizzo and Castello di Fiagnano olistostromes	53	(1)
Olistostromes: General characters	54	(1)
Genesis of the olistostromes	54	(7)
Mixing of different lithotypes: Present-day and ancient models	55	(3)
Depositional mechanism	58	(1)
Interpretation of the studied olistostromes	58	(3)
Summary of depositional and deformational history and setting of tectonosomes and olistostromes	61	(2)
Pre-late Eocene (Eoalpine-Mesoalpine tectonics)	61	(1)
Late Eocene-recent (Neoalpine tectonics)	62	(1)
Acknowledgments	63	(1)
References cited	64