<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In 1802, Leopold von Buch described some outcrops of orbicular granite in the Karkonosze granite, Lower Silesia, Poland. In that publication, Abraham Gottlieb Werner wrote a foreword dated 1800. The Silesian discovery predates that of the well-known orbicular diorite (Napoleonite) in outcrop on Corsica and, thus, may be the first ever record of this distinctive rock type in its geological context. The characterizing, closely-packed, simple orbs comprise K-feldspar cores surrounded by rims of radiating K-feldspar and quartz. Rapid growth from a hydrous, pegmatitic melt is indicated. The Karkonosze outcrop, in the timing of its discovery, is a unique part of the geological heritage.</p></abstract>

In 1802, Leopold von Buch described some outcrops of orbicular granite in the Karkonosze granite, Lower Silesia, Poland. In that publication, Abraham Gottlieb Werner wrote a foreword dated 1800. The Silesian discovery predates that of the well-known orbicular diorite (Napoleonite) in outcrop on Corsica and, thus, may be the first ever record of this distinctive rock type in its geological context. The characterizing, closely-packed, simple orbs comprise K-feldspar cores surrounded by rims of radiating K-feldspar and quartz. Rapid growth from a hydrous, pegmatitic melt is indicated. The Karkonosze outcrop, in the timing of its discovery, is a unique part of the geological heritage.

Orbicular granite near Jelenia Góra in southwestern Poland: the first outcrops?

School of Geology and Geophysics, University College Dublin, Dublin 4, Ireland

Institute of Landscape Architecture, Wrocław University of Environmental and Life Sciences, pl. Grunwaldzki 24, 50-363 Wrocław, Poland

Mineralogia

{"article-title":"Orbicular granite near Jelenia Góra in southwestern Poland: the first outcrops?"}

In 1802, Leopold von Buch described some outcrops of orbicular granite in the Karkonosze granite, Lower Silesia, Poland. In that publication, Abraham Gottlieb...

Orbicular granite near Jelenia Góra in southwestern Poland: the first outcrops?

Publié en ligne: 13 févr. 2009

Pages: 79 - 85

DOI: https://doi.org/10.2478/v10002-008-0006-4

Mots clés
orbicular granite, Leopold von Buch, Karkonosze granite, Lower Silesia, Napoleonite

This content is open access.

Orbicular granite near Jelenia Góra in southwestern Poland: the first outcrops?

Publié en ligne: 13 févr. 2009

Pages: 79 - 85

DOI: https://doi.org/10.2478/v10002-008-0006-4

Mots clésorbicular granite, Leopold von Buch, Karkonosze granite, Lower Silesia, Napoleonite

This content is open access.

Mots clés
orbicular granite, Leopold von Buch, Karkonosze granite, Lower Silesia, Napoleonite