A new classification system for pebble and crystal shapes based on static equilibrium points

Tímea Szabó, G. Domokos

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The most widespread classification system for pebble shapes in geology is the Zingg system which relies on several length measurements. Here we propose a completely different classification system which involves counting static equilibria. We show that our system is practically applicable: simple hand experiments are suitable and easy to use to determine equilibrium classes. We also propose a simplified classification scheme called E-classification which is considerably faster in practice than the classical Zingg method. Based on statistical results of 1000 pebbles from several different geologic locations we show that E-classes are closely related to the geometric shape of pebbles. We compared E-classes to the Zingg classes, and we found that all the information contained in Zingg classification can be extracted from equilibrium classification. However, the new method is more sophisticated: it may help to identify shape attributes not discovered so far and it is able to store information on special geometries, e.g. on crystal shapes.

Original languageEnglish
Pages (from-to)1-19
Number of pages19
JournalCentral European Geology
Volume53
Issue number1
DOIs
Publication statusPublished - Mar 1 2010

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pebble
crystal
geology
geometry
experiment

Keywords

  • crystal
  • pebble
  • shape indices
  • static equilibria
  • Zingg classes

ASJC Scopus subject areas

  • Geology

Cite this

A new classification system for pebble and crystal shapes based on static equilibrium points. / Szabó, Tímea; Domokos, G.

In: Central European Geology, Vol. 53, No. 1, 01.03.2010, p. 1-19.

Research output: Contribution to journalArticle

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