<script type="text/javascript">
<!--
document.write('<div id="oa_widget"></div>');
document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=undefined&type=result"></script>');
-->
</script>

COPY SCRIPT

For further information contact us at helpdesk@openaire.eu

Silica Percentages of Igneous Rocks

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 1921Publisher:Cambridge University Press (CUP)Journal:Geological Magazine, volume 58, pages 436-440 (issn: 0016-7568, eissn: 1469-5081,

Authors: Eyles, V. A.; Simpson, J. B.;

doi: 10.1017/s0016756800104935

Silica Percentages of Igneous Rocks

- Summary
- Metrics

Abstract

Figs. I–VII give a graphic representation of the average silica percentage of a number of igneous rock types, so arranged as to show the relation between silica-percentage and rock nomenclature. All the analyses used were obtained from the 1917 edition of H. S. Washington's Chemical Analyses of Igneous Rocks”. This book contains some 8,000 rock analyses from many parts of the world. They are divided into two classes, superior and inferior. Only those of the former category (some 6,000 in all) have been utilized.

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	5
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Average
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average