994 resultados para 7140-324


Relevância:

100.00% 100.00%

Publicador:

Relevância:

60.00% 60.00%

Publicador:

Resumo:

This study investigates the landscape evolution and soil development in the loess area near Regensburg between approximately 6000-2000 yr BP (radiocarbon years), Eastern Bavaria. The focus is on the question how man and climate influenced landscape evolution and what their relative significance was. The theoretical background concerning the factors that controlled prehistoric soil erosion in Middle Europe is summarized with respect to rainfall intensity and distribution, pedogenesis, Pleistocene relief, and prehistoric farming. Colluvial deposits , flood loams, and soils were studied at ten different and representative sites that served as archives of their respective palaeoenvironments. Geomorphological, sedimentological, and pedological methods were applied. According to the findings presented here, there was a high asynchronity of landscape evolution in the investigation area, which was due to prehistoric land-use patterns. Prehistoric land use and settlement caused highly difIerenciated phases of morphodynamic activity and stability in time and space. These are documented at the single catenas ofeach site. In general, Pleistocene relief was substantially lowered. At the same time smaller landforms such as dells and minor asymmetric valleys filled up and strongly transformed. However, there were short phases at many sites, forming short lived linear erosion features ('Runsen'), resulting from exceptional rainfalls. These forms are results of single events without showing regional trends. Generally, the onset of the sedimentation of colluvial deposits took place much earlier (usually 3500 yr BP (radiocarbon) and younger) than the formation of flood loams. Thus, the deposition of flood loams in the Kleine Laaber river valley started mainly as a consequence of iron age farming only at around 2500 yr BP (radiocarbon). A cascade system explains the different ages of colluvial deposits and flood loams: as a result of prehistoric land use, dells and other minor Pleistocene landforms were filled with colluvial sediments. After the filling of these primary sediment traps , eroded material was transported into flood plains, thus forming flood loams. But at the moment we cannot quantify the extent ofprehistoric soil erosion in the investigation area. The three factors that controlled the prehistoric Iandscapc evolution in the Ioess area near Regensburg are as follows: 1. The transformation from a natural to a prehistoric cultural landscape was the most important factor: A landscape with stable relief was changed into a highly morphodynamic one with soil erosion as the dominant process of this change. 2. The sediment traps of the pre-anthropogenic relief determined where the material originated from soil erosion was deposited: either sedimentation took place on the slopes or the filled sediment traps of the slopes rendered flood loam formation possible. Climatic influence of any importance can only be documented as the result of land use in connection with singular and/or statistic events of heavy rainfalls. Without human impact, no significant change in the Holocene landscape would have been possible.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Será votado amanhã na Assembleia Nacional Constituinte (ANC) mudanças no Regimento Interno, se aprovadas o anteprojeto votado na Comissão de Sistematização poderá receber emendas e ser modificado. Constituintes começam a reexaminar todo o trabalho realizado na Comissão de Sistematização. Entre os temas debatidos a educação foi um dos mais importantes. O Deputado Geraldo Alckmin (PMDB-SP) relata sobre a fixação de recursos mínimos para garantir o investimento em educação no país. O Deputado Átila Lira (PFL-PI) afirma que essas verbas fazem com que os governos tenham pelo menos o mínimo de compromisso com a educação. Em relação à reforma tributária alguns Constituintes defendem um tratamento diferenciado para região nordeste como o Deputado Nestor Duarte (PMDB-BA). Já o Deputado Sérgio Brito (PFL-BA) quer uma reforma tributária com implantação gradual. O Deputado Hélio Manhães (PMDB-ES) expõe sua opinião sobre a reforma tributária aprovada pela Comissão de Sistematização. A reforma urbana também teve destaque nas discussões da Comissão de Sistematização. O Deputado Luiz Alberto Rodrigues (PMDB-MG) julga essencial que o problema da reforma urbana seja resolvido. O Deputado Dirceu Carneiro (PMDB-SC) considera a reforma urbana mais importante que a reforma agrária.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Taxonomic observations are given on Dangeardia sporapiculata n. sp. Furthermore the term 'apiculus' and the species limitation of some chytrids are being discussed. It is concluded that the newly described species Dangeardia sporapiculata does not fit satisfactorily into the present system of phlyctidiacee, because their characteristics do not agree exactly with any genus.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Contient : I翰林少微通鑑大全.Han lin shao wei tong jian da quan.Abrégé des Annales générales, par Shao wei ; II宋元翰林資治通鑑Song yuan han lin zi zhi tong jian.Annales générales : Song et Yuan (960-1368)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Contient : I翰林少微通鑑大全.Han lin shao wei tong jian da quan.Abrégé des Annales générales, par Shao wei ; II宋元翰林資治通鑑Song yuan han lin zi zhi tong jian.Annales générales : Song et Yuan (960-1368)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Incluye cuatro índices que facilitan la búsqueda de los artículos publicados desde los números 324 a 326 y en el número extraordinario del año 2001. En el primer índice, los artículos se agrupan por notaciones de la Clasificación Decimal Universal (CDU) y en los siguientes por orden alfabético de autores, títulos y materias.

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Absage eines Besuchs, Büste Wolfgang Amadeus Mozarts