Wyniki wyszukiwania

1

A granitoid xenolith from rhyodacites of Zalas near Krzeszowice

100%

Heflik W., Muszynski M.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1993

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tom 41

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nr 4

2

Influence of the pedogenic process of humus accumulation on the physical and chemical transformation of quartz grain surfaces

84%

Chojnicki J., Zagajewski A.

Polish Journal of Soil Science

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2010

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tom 43

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nr 2

The pedogenic process of humus accumulation causes stronger and more diverse chemical rather than physical transformations of quartz grain surfaces. Chemical weathering of quartz grain surfaces in the humus horizon results in etching and corrosion over oncrusting and encrusting; an opposite situation is observed in the parent rock and the underlying rocks. Etchings and corrosion pits in the humus horizon were formed in the pedogenic process of humus accumulation, whereas oncrustings and encrustings in the parent rock and the underlying rocks are of geological origin. Microchemical analysis (EDS) indicated the highest total content of Si, Ca, Al and Fe in the oncrustings and encrustings on quartz grains.

3

Orthogneisses and metapelites from a polyphase tectonic zone - mesostructural versus microstructural evidence: an example from the Czerniawa Zdroj section [Izera-Karkonosze Block, West Sudetes]

84%

Czaplinski W.

Geologia Sudetica

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1998

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tom 31

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nr 1

4

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Light minerals of beach sediments from Southern Tamilnadu, South East coast of India

84%

Cherian A., Chandrasekar N., Rajamanickam V.

Oceanologia

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2004

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tom 46

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nr 2

A brief investigation of light minerals along the beaches between Valinokkam and Tuticorin has been carried out for the first time along the Southern Tamilnadu coast in order to discover the provenance of the sediments. The study spotlights a wide variation in light mineralogy along the three zones of the investigated area (Valinokkam, Vaippar and Tuticorin). A higher percentage of quartz is reported from the Valinokkam (48.34 to 68.63%) and Tuticorin zones (55.66 to 73.05%) than from the Vaippar zone (40.24 to 60.77%). The trend with regard to the maturity index is similar, with appreciably higher values in Valinokkam (1.15 to 1.89) and Tuticorin (1.61 to 1.94) than Vaippar (0.79 to 1.39). Morphological analysis of quartz grains shows a higher order of sphericity and roundness values in Valinokkam and Tuticorin as compared to Vaippar. Moreover, the surface texture of quartz grains observed with the aid of scanning electron microscope (SEM) photographs reveals the presence of different depositional environments and the multiple origin of beach sediments in the study area. From the present study of the light mineralogy of beach sediments, it is inferred that the source of the sediments is a mixed type: igneous and metamorphic crystalline rocks, together with palaeosediments.

5

Zrosty kryształów

59%

Majerowicz A.

Wszechświat

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1957

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nr 03

6

Kamień w służbie człowieka

42%

Laszkiewicz A.

Wszechświat

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1957

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nr 03

Ograniczanie wyników

2 Wszechświat

1 Bulletin of the Polish Academy of Sciences. Earth Sciences

1 Geologia Sudetica

1 Oceanologia

1 Polish Journal of Soil Science

1 Chandrasekar N.

1 Cherian A.

1 Chojnicki J.

1 Czaplinski W.

1 Heflik W.

1 Laszkiewicz A.

1 Majerowicz A.

1 Muszynski M.

1 Rajamanickam V.

1 Zagajewski A.

1 2010

1 2004

1 1998