Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonatesediments of Istria where they mark the top of fining upwards sequences. When they showevidence of subaerial exposure and pedogenesi...Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonatesediments of Istria where they mark the top of fining upwards sequences. When they showevidence of subaerial exposure and pedogenesis they are considered paleosols. The claymineralogical composition is as follow: (1) randomly oriented I/S mixed layer, (2) regularlyoriented I/S mixed layer, (3) illitic material, (4) kaolinite and (5) chlorite. The insoluble limestoneresidue situated immediately below the greenish clays is dominated by smectite, and also containskaolinite and illitic material. The very high smectite content in the insoluble residue is probablythe result of additions of volcanic dust during carbonate sedimentation. That clay mineralcomposition in the pelitic material clearly indicates the influence of both pedogenic and diageneticprocesses. It may also indicate additional volcanic dust contribution before and during thesubaerial exposure.展开更多
Life and Water on Karst:Monitoring of transboundary water resources of Northern Istria by Ranko Biondićet al.is freely available for download from Google Books.This book discusses life and water resources in a signifi...Life and Water on Karst:Monitoring of transboundary water resources of Northern Istria by Ranko Biondićet al.is freely available for download from Google Books.This book discusses life and water resources in a significant karst area.The contents are organized into three main parts.The first part provides a general discussion of karst topography,the second discusses the study area(Northern Istria),and the third addresses the monitoring of karst water resources.Collectively,the authors of each chapter describe the characteristics of the karst area of Northern Istria;karst and karst phenomena;karst hydrogeology,ecology and microbiology;and the vulnerability of karst areas to various anthropogenic activities.展开更多
文摘Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonatesediments of Istria where they mark the top of fining upwards sequences. When they showevidence of subaerial exposure and pedogenesis they are considered paleosols. The claymineralogical composition is as follow: (1) randomly oriented I/S mixed layer, (2) regularlyoriented I/S mixed layer, (3) illitic material, (4) kaolinite and (5) chlorite. The insoluble limestoneresidue situated immediately below the greenish clays is dominated by smectite, and also containskaolinite and illitic material. The very high smectite content in the insoluble residue is probablythe result of additions of volcanic dust during carbonate sedimentation. That clay mineralcomposition in the pelitic material clearly indicates the influence of both pedogenic and diageneticprocesses. It may also indicate additional volcanic dust contribution before and during thesubaerial exposure.
文摘Life and Water on Karst:Monitoring of transboundary water resources of Northern Istria by Ranko Biondićet al.is freely available for download from Google Books.This book discusses life and water resources in a significant karst area.The contents are organized into three main parts.The first part provides a general discussion of karst topography,the second discusses the study area(Northern Istria),and the third addresses the monitoring of karst water resources.Collectively,the authors of each chapter describe the characteristics of the karst area of Northern Istria;karst and karst phenomena;karst hydrogeology,ecology and microbiology;and the vulnerability of karst areas to various anthropogenic activities.
