Geo-archaeology of the Roman palaeosurface of Sena Gallica (Senigallia, Italy)

ABSTRACTSena Gallica (Senigallia), in the northern Marche region, was the first Roman colony on the Adriatic coast founded at the beginning of the third century BC. This research adopted an integrated approach to different information sources that combines old and new data, archaeological excavations, topographic and geophysical surveys, and geological and geomorphological analyses. The data are managed within a GIS and supported by 3D modelling. One of the results of this work is a map which represents the geomorphological setting of the Roman colony, close to the mouth of the Misa river. The settlement exploited the top-surface of the uppermost Pleistocene–early Holocene coastal fan of the Misa river, now only preserved at the apex sector truncated seaward by wave erosion. The top-surface of the fan apex, in turn, was partly re-incised by stream erosion producing a series of slight topographic mounds, which were selected for the earliest human settlement (V-IV c. BC). Some of the mounds resulted in a pr..

Resistance to lodging and culm breakage in tropical corn

The objective of this work was to evaluate corn genotypes for resistance to lodging and to culm breakage and to describe a new method for evaluating these traits. Assays were carried out in randomized blocks, with 85 tropical genotypes of corn and four replicates in five localities. The force required to pull out the plant and to break the culm and the breaking angle of momentum were evaluated. The measurements were made with equipment developed specifically for this purpose. Variance analyses and the Scott-Knott test were carried out for the traits. The forces required to pull out the plant and break the culm, and the breaking angle for the culms were significantly interactive with the locality. The means varied from 49.43 to 76.03 kgf for the force required to pull out the plants, from 1.07 to 2.76 kgf for the force required to break the culm, and from 16.15 to 41.18º for the angle at the breakage of the culm. There is genetic variability for selection for resistance to lodging and culm breakage in tropical corn. The method described is efficient for evaluating and differentiating the genotypes.O objetivo deste trabalho foi avaliar genótipos de milho quanto à resistência ao acamamento e ao quebramento do colmo e apresentar metodologia para avaliar essas características. Os ensaios foram realizados em blocos ao acaso, com 85 genótipos tropicais de milho e quatro repetições, em cinco locais. Foram avaliadas: as forças necessárias para o arranquio da planta e para o quebramento do colmo e o ângulo no momento do quebramento. As medições foram realizadas com equipamentos desenvolvidos para essas finalidades. Foram realizadas análises de variância e teste de Scott-Knott quanto às características. As forças de arranquio da planta, de quebramento do colmo e ângulo no momento do quebramento do colmo interagiram significativamente com a localidade. As médias variaram de 49,43 a 76,03 kgf para a força de arranquio da planta, de 1,07 kgf a 2,76 kgf para força de quebramento do colmo, e de 16,15 a 41,18º para o ângulo de quebramento do colmo. Existe variabilidade genética para seleção quanto à resistência ao acamamento e ao quebramento do colmo em genótipos tropicais de milho. A metodologia apresentada é eficiente para a avaliação e discriminação de genótipos

Diverging drainage in the Marche Apennines (central Italy)

In the Marche Apennines diverging drainage developed on the surface of mid-Pleistocene fanglomerates or, at places, on correlated erosional glacis. In mountain areas, diverging nets correspond with wide glacis shaped in severe cold climates at the end of the middle Pleistocene. Glacis were formed by deposition of coalescing alluvial fans and concurrent shaping of smooth erosional surfaces along and near their margins. In the coastal zone, wide fans and related fluvial plains were constructed in Crotonian times close to the mouth of trunk streams crossing a just emerged piedmont area. Both the control of the "cone shaped" topography on post-aggradational flow patterns and the entrenching of primitive distributary channels are conceivable in developing the diverging drainage of the study area. Four case studies, from areas differing both in age and in geological and structural settings, attest to the recurrence of this drainage in composing, together with other patterns, the grain of larger nets. Moreover, the diverging drainage of the coast area allows us to infer that superposition is an effective mechanism of net development on Plio-Pleistocene terrains of the Marche Apennine piedmont at the time when they became emergent. © 2002 Elsevier Science Ltd and INQUA. All rights reserved

Cicli continentali tardo-quaternari lungo i tratti vallivi mediani delle Marche settentrionali

none2noneO. Nesci; D. SavelliNesci, Olivia; Savelli, Daniel

Geomorfologia ed evoluzione del reticolo idrografico e delle piane alluvionali marchigiane.

none2noneO. Nesci; D. SavelliNesci, Olivia; Savelli, Daniel