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| Pannekoek, A.J.. |
| In dem Fossilverzeichnis sind die Arten in der Regel unter dem Namen aufgeführt den sie in der neuesten bei der Art zitierten Arbeit tragen ¹). Wenn eine Art in früheren Arbeiten über Niederländisch Indien anders benannt worden ist, so findet man die Nummern dieser älteren Arbeiten doch hinter dem neueren Artnamen. Der ältere, hinfällige Name ist in solchen Fallen in einer Bemerkung zu finden, ausserdem aber ist er auch in dem Artenverzeichnis aufgenommen, aber dort nur von einem Hinweis nach dem neueren Namen versehen, wo man also die zugehörige Literatur findet. Wenn von einer früher beschriebenen Art einige wenige Exemplare nach neuerer Bearbeitung zu einer anderen, schon vom selben Fundort bekannten Art gebracht worden sind, so sind diese wenigen... |
| Tipo: Article / Letter to the editor |
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| Ano: 1931 |
URL: http://www.repository.naturalis.nl/record/505703 |
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| Hinz, K.; Pannekoek, A.J.. |
| In 1968 continuous seismic profiles with a total length of 150 km were made in the Ría de Arosa (Galicia, NW Spain). They were executed by the Bundesanstalt für Bodenforschung (Hannover) with the assistance of two members of the Department of Geology of the University of Leiden (The Netherlands). The pneuflex (airgun) system used for profiling is described. The transformation of travel-time profiles into depth profiles was done automatically with the aid of a computer program. The profiles reveal the presence, below some 7—12 m of Holocene marine muds, of bedded deposits with a thickness of about 30 m (and in the outer part of the ria even more than 60 m), which are interpreted as being of fluvial origin. They are underlain by what is assumed to be... |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/505882 |
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| Pannekoek, A.J.. |
| The geomorphology of western Galicia is reconsidered in the light of Nonn's monograph (1966), and an envelope map of the relief, as defined by Stearns (1967) and Pannekoek (1967), and an interpretation of the latter are also presented. The envelope map shows more clearly than an ordinary contour map that the major relief features are not controlled by the lineations of the Hercynian basement but by late- or post-Hercynian faults, some of which may have been reactivated in Tertiary times. Concerning the geomorphological evolution, the author agrees with most of Nonn's conclusions, although there is some divergence on minor points. The isolated mountain massifs, capped by remnants of older pediplains, already existed in Upper Miocene times. The depressions... |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/505684 |
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| Oele, E.; Sluiter, W.J.; Pannekoek, A.J.. |
| SÉDIMENTATION PLIOCÈNE ET QUATERNAIRE DANS LE CONFLENT, FOSSÉ INTRAMONTAGNEUX DANS LES PYRÉNÉ ES ORIENTALES Cette contribution contient quelques résultats d’études sédimentologiques sur les dépôts pliocènes at quaternaires remplissant le fossé qui traverse les Pyrénées orientales en direction oblique. Les données sédimentologiques pourront fournir quelques indications sur les conditions de dépôt et sur la provenance de ces assises, ainsi que sur le climat. Pour les couches rouges de Codalet, remplies de fragments de schiste, l’opinion de Bourcart selon laquelle elles ont été formées par des coulées boueuses, est confirmée. Elles proviennent de sols rouges formés avant le Pliocène sur les schistes du Paléozoique Ancien. Les arkoses de Marquixanes, contenant... |
| Tipo: Article / Letter to the editor |
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| Ano: 1963 |
URL: http://www.repository.naturalis.nl/record/505594 |
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| Sluiter, W.J.; Pannekoek, A.J.. |
| SEDIMENTOLOGY AND GEOMORPHOLOGY OF EL BIERZO (NW SPAIN) The purpose of this investigation was to study sedimentation in an intramontane basin in its relation to the relief of the surrounding mountain area. El Bierzo, an intramontane basin in NE Spain, is partly filled by continental Tertiary sediments whose age is thought to be Vindobonian on the basis of comparison with those of the Duero basin. These deposits were analysed by sedimentological methods: determination of grain-size, grain roundness, pebble composition, mineralogy of the light and heavy fractions and of the clays (by x-ray). In some places the Tertiairy deposits overlie deeply weathered Paleozoic rocks, considered to be the C-horizon of paleosols of Tertiary age from which the red and more... |
| Tipo: Article / Letter to the editor |
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| Ano: 1964 |
URL: http://www.repository.naturalis.nl/record/505722 |
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| Brongersma, L.D.; Pannekoek, A.J.. |
| Investigaciones en la Ría de Arosa y sus alrededores, 1962—1964. Introducción. En los veranos de 1962 y 1963 y en el invierno y verano de 1964 un grupo científico holandés hizo investigaciones sedimentológicas, oceanógraficas, zoológicas y botánicas en la Ría de Arosa y sus alrededores. Se tomaron muestras en 934 localidades indicadas en el mapa (Apéndice I). Los nombres de los participantes han sido mencionados en el Apéndice II. El centro de las investigaciones era la fábrica de Don Luis Losada Lago en la Punta Preguntoiro en Villajuán cerca de Villagarcía de Arosa. En el texto siguiente se mencionan los periódicos en que serán publicados los resultados. |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/505842 |
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| Pannekoek, A.J.. |
| This paper is intended to provide a geomorphological introduction to a series of papers on the sedimentology and weathering phenomena of the Ría de Arosa area. The area contains a large mass of coarse-grained porphyritic granite surrounded by other crystalline rocks. The granite is deeply weathered and displays typical features such as spheroidal weathering and tors. The main relief elements are the following. (a) Low-angle slopes, many of which are foot-slopes (glacis) developed mainly on deeply weathered rock, and covered in many parts by colluvium and bedded slope-deposits (Nonn 1964). The latter locally continue below the present sea-level as kaolinite deposits. The low-angle slopes occupy a large area on the intrusive granite around the Ría de Arosa.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1966 |
URL: http://www.repository.naturalis.nl/record/505795 |
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