Quaternary Geomorphology and Geology
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Map delimiting the areas with different types of land movements, representing the most intense and frequent movements. It therefore shows the distribution and extent of the most problematic areas from a practical point of view. Land movements are classified into four main groups: horizontal component movements (landslides and landslides), vertical component movements (subsidence and subsidence, and expansive clays), unstable processes in coastal areas and movements related to mining operations. Areas with significant erosion processes are also included. This map, published in 1987, was drawn up entirely by staff of the Geological Survey of Spain in response to the need for information on geological hazards and risks on a national scale.
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This map shows deposits dated as Plio-Pleistocene to contemporary, classified in 10 geochronological intervals and separated according to their genesis. Glacial, volcanic, karstic, aeolian, littoral, edaphic, palaeontological and prehistoric entities are included.
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This Map depicts the materials or rocks that appear on the surface of the sheet, their spatial distribution, nature and geometrical relationships. The cartographic units are chronostratigraphic groupings, with common lithology and age formed by strata which are called formations, groups or members; other non-stratified ones such as granites are represented. The structural relationships between them are expressed by symbols, which gives the map a three-dimensional character that is completed by additional geological profiles. These are the graphic expression of the deep geometrical arrangement of the units shown on the geological map. Applied information such as water points, mineral deposits and indications, presence of fossils and other elements of punctual representation are added by means of symbology. The digital information, geological map 1:100.000, chronolithostratigraphic legend and legend of geological symbols, is stored in coverage format (ESRI). There is a guide that reflects its organisation and codification. The creation of this cartography is based on the compilation of existing information, mainly MAGA cartography at a scale of 1:50,000, doctoral theses and other research work.
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The map of the island of La Palma includes volcanic and sedimentary units separated by different types of contacts: undifferentiated between formations, between lava flows of the same formation and intrusive. The different units have been grouped into different categories according to their genesis, structure and arrangement, such as eruptions, edifices or volcanoes. The direction of the flow lava flows is shown by means of the corresponding symbology. Tectonic processes are shown as faults and recent local features as active slumps. Additional information includes mineral deposits and indications, archaeological sites and other volcanic elements of specific representation. The map is accompanied by the chronolithostratigraphic legend and conventional signs.
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Map showing the chronolithostratigraphic units of the area covered by the sheet separated by different types of contacts: normal or concordant, discordant and mechanical or intrusive. The tectonic structure is represented by the cartographic traces of the folds, the orientation and dip of the planar and linear elements contained in the rocks, as well as by the structural relationship -by means of faults and thrusts- between the rock assemblages differentiated cartographically. The map is accompanied by the lithostratigraphic legend and conventional signs.
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Map showing the chronolithostratigraphic units of the area covered by the sheet separated by different types of contacts: normal or concordant, discordant, intrusive and other. The tectonic structure is represented by the cartographic traces of folds, the orientation and dip of planar and linear elements contained in the rocks, as well as by the structural relationship - by means of faults and thrusts - between the rock assemblages differentiated cartographically. The map is accompanied by the lithostratigraphic legend and conventional signs.
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Map showing the chronolithostratigraphic units of the area covered by the sheet separated by different types of contacts: normal or concordant, discordant and mechanical or intrusive. The tectonic structure is represented by the cartographic traces of the folds, the orientation and dip of the planar and linear elements contained in the rocks, as well as by the structural relationship -by means of faults and thrusts- between the rock assemblages differentiated cartographically.