More than half of the world's petroleum is to be found in carbonate rocks, for example in the Middle East, the former USSR and in North America. These rocks show a bewildering diversity of grains and textures, due in part to the wealth of different fossil organisms which have contributed to carbonate sedimentation, and in part to a wide variety of diagenetic processes which can radically modify textures and obscure the depositional fabric. Careful petrographic study with a polarising microscope is a key element of any study of carbonate sediments, as a companion to field or core logging, and as a necessary precursor to geochemical analysis. This atlas, which illustrates in full colour a range of features not attempted in any general textbook, is designed as a laboratory manual to keep beside the microscope, as an aid to identifying grain types and textures in carbonates. It appeals alike to undergraduate and graduate students and to professionals in teaching institutions, research laboratories and industry.

Teacher education is continually undergoing change and this book takes a close look into the current status. It examines the history of teacher preparation, the role of the employer and the aims of education, giving a critical review of the present climate where changes in several European countries are underway. They address the question of why the changes are being made now and conclude that such changes, particularly in the UK, are ideological as opposed to quality-based. New proposals and legislation in the European Unions countries of Britain, France, Germany and Portugal are considered, from a comparative perspective, alongside Poland and the United States; the latter also experiencing change but for different reasons. Aimed at all readers interested in the role of education in Europe, this text should also appeal to students and lecturers in education in Europe, and to the informed general reader interested in the state of education today.

Essays exploring medieval castration, as reflected in archaeology, law, historical record, and literary motifs. Castration and castrati have always been facets of western culture, from myth and legend to law and theology, from eunuchs guarding harems to the seventeenth- and eighteenth-century castrati singers. Metaphoric castration pervadesa number of medieval literary genres, particularly the Old French fabliaux - exchanges of power predicated upon the exchange or absence of sexual desire signified by genitalia - but the plain, literal act of castration and its implications are often overlooked. This collection explores this often taboo subject and its implications for cultural mores and custom in Western Europe, seeking to demystify and demythologize castration. Its subjects includearchaeological studies of eunuchs; historical accounts of castration in trials of combat; the mutilation of political rivals in medieval Wales; Anglo-Saxon and Frisian legal and literary examples of castration as punishment; castration as comedy in the Old French fabliaux; the prohibition against genital mutilation in hagiography; and early-modern anxieties about punitive castration enacted on the Elizabethan stage. The introduction reflects on these topics in the context of arguably the most well-known victim of castration in the middle ages, Abelard. LARISSA TRACY is Associate Professor of Medieval Literature at Longwood University. Contributors: Larissa Tracy, Kathryn Reusch, Shaun Tougher, Jack Collins, Rolf H. Bremmer Jr, Jay Paul Gates, Charlene M. Eska, Mary A. Valante, Anthony Adams, Mary E. Leech, Jed Chandler, Ellen Lorraine Friedrich, Robert L.A. Clark, Karin Sellberg, LenaWanggren

More than half of the world's petroleum is to be found in carbonate rocks, for example in the Middle East, the former USSR and in North America. These rocks show a bewildering diversity of grains and textures, due in part to the wealth of different fossil organisms which have contributed to carbonate sedimentation, and in part to a wide variety of diagenetic processes which can radically modify textures and obscure the depositional fabric.Careful petrographic study with a polarising microscope is a key element of any study of carbonate sediments, as a companion to field or core logging, and as a necessary precursor to geochemical analysis. This atlas, which illustrates in full colour a range of features not attempted in any general textbook, is designed as a laboratory manual to keep beside the microscope, as an aid to identifying grain types and textures in carbonates. It appeals alike to undergraduate and graduate students and to professionals in teaching institutions, research laboratories and industry.

Essays exploring medieval castration, as reflected in archaeology, law, historical record, and literary motifs. Castration and castrati have always been facets of western culture, from myth and legend to law and theology, from eunuchs guarding harems to the seventeenth- and eighteenth-century castrati singers. Metaphoric castration pervadesa number of medieval literary genres, particularly the Old French fabliaux - exchanges of power predicated upon the exchange or absence of sexual desire signified by genitalia - but the plain, literal act of castration and its implications are often overlooked. This collection explores this often taboo subject and its implications for cultural mores and custom in Western Europe, seeking to demystify and demythologize castration. Its subjects includearchaeological studies of eunuchs; historical accounts of castration in trials of combat; the mutilation of political rivals in medieval Wales; Anglo-Saxon and Frisian legal and literary examples of castration as punishment; castration as comedy in the Old French fabliaux; the prohibition against genital mutilation in hagiography; and early-modern anxieties about punitive castration enacted on the Elizabethan stage. The introduction reflects on these topics in the context of arguably the most well-known victim of castration in the middle ages, Abelard. Larissa Tracy is Associate Professor of Medieval Literature at Longwood University. Contributors: Larissa Tracy, Kathryn Reusch, Shaun Tougher, Jack Collins, Rolf H. Bremmer Jr, Jay Paul Gates, Charlene M. Eska, Mary A. Valante, Anthony Adams, Mary E. Leech, Jed Chandler, Ellen Lorraine Friedrich, Robert L.A. Clark, Karin Sellberg, LenaWånggren