Received: 15 December 2025
Accepted: 18 August 2026
Online: 1 November 2026
H. Editor: J. Cempírek
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Tourmaline Crystals with Corrosion Phenomena from the Skardu Area, North Pakistan. Part 1: Diversity of the outer Morphology
Journal of Geosciences, volume 71 (2026), issue 1, 57 - 77
DOI: http://doi.org/10.3190/jgeosci.0056.25
Article supplementary material:
- ESM 1a - A graphical experiment regarding etch pits: squares are removed along a dislocation line at removal ratios of 5:1, 1:1, and 1:5; b - Model of the formation of an etch pit. Starting from the center of the etch pit, thin crystal layers detach from the crystal surface in a wave-like pattern (Lassaga, 2001); c - A relief of hillocks develops through the gradual dissolution of the crystal around dislocations., (jpg, 5.36 Mb)
- ESM 2a-e - Etched schorl-crystals from Skardu with etched-out hillocks on the pedion face, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 20.1 Mb)
- ESM 3a-e - Etched schorl-crystals from Skardu, Pakistan with etched-out grooves on the pedion face, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 25.2 Mb)
- ESM 4a-e - Etched schorl-crystals from Skardu, Pakistan with etched-out terraces, etch pits and an etched landscape of stairs on the trigonal pyramid z, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 23.6 Mb)
- ESM 5 Etched schorl-crystals from Skardu: a-d - with etched grooves and e - hillocks on the trigonal pyramid z, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 23.6 Mb)
- ESM 6 Etched schorl-crystals from Skardu and Stak Nala: a - with etch pits; and b-e - etched-out hillocks on the trigonal pyramid z, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 21.9 Mb)
- ESM 7a-c - Etched surfaces of the trigonal pyramid e from Skardu with: a - etch pits; b -hillocks, c - grooves; e - the ditrigonal pyramid u from the Leila Peak, left: the whole specimen, middle and right: macroscopic photographs of the faces in reflecting yellow light. Grey bars: scale and inventory numbers., (jpg, 21.8 Mb)
- ESM 8 A 19 cm long double terminated tourmaline crystal from Skardu: a - side view; b - hardly etched faces of the trigonal pyramid r on the analogous pole; c - strongly etched faces of the trigonal pyramid r on the antilogous pole., (jpg, 4.85 Mb)
- ESM 9a - From the crystal on the left side on the top with etched grooves on its pedion a series of 8 slices was produced. Only the uppermost slice 8 contains a pattern which corresponds to the grooves; b - A stack of the slices; c and d - detailed images from the same section of the surface and the thin section., (jpg, 5.94 Mb)
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Journal of Geosciences, Published by © Czech Geological Society, with support from the Czech Geological Survey.
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ISSN: 1803-1943 (online), 1802-6222 (print)
email: editor(at)jgeosci.org
Webdesign inspired by aTeo.
ISSN: 1803-1943 (online), 1802-6222 (print)
email: editor(at)jgeosci.org
IF (WoS, 2024): 1.3
5 YEAR IF (WoS, 2024): 1.4
Policy: Open Access
ISSN: 1802-6222
E-ISSN: 1803-1943