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Mont Lyall Agate Mine, La Haute-Gaspésie RCM, Gaspésie-Îles-de-la-Madeleine, Québec, Canadai
Regional Level Types
Mont Lyall Agate MineMine
La Haute-Gaspésie RCMRegional County Municipality
Gaspésie-Îles-de-la-Madeleine- not defined -
QuébecProvince
CanadaCountry

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Key
Latitude & Longitude (WGS84):
48° 48' 14'' North , 66° 5' 13'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Sainte-Anne-des-Monts5,602 (2016)46.3km
Name(s) in local language(s):
Mine d'agates du Mont Lyall


The Mont Lyall Agate Mine is a dig-for-fee site, in the Chic-Choc Mountains, in central Gaspe Peninsula, in the Quebec Appalachians. Agate thundereggs and geodes lined with smoky quartz, clear quartz or amethyst crystals are found in rhyolitic flows that have been altered to green clay. Some geodes contain botryoidal chalcedony (blue chalcedony, carnelian, etc...), sometimes coated with druzy quartz. Mt Lyall is an ancient volcano, formed in the Devonian epoch. It is part of an igneous complex know as "Dôme de Lemieux". Felsic porphyry is found at the top of the mountain, basalt in the middle part, and red porphyric rhyolite at the base.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Agate
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Amethyst
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Carnelian
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Chalcedony
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Jasper
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Carnelian4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
var: Agate-SiO2
var: Amethyst-SiO2
var: Carnelian-SiO2
var: Chalcedony-SiO2
var: Jasper-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

CCarbon
C CalciteCaCO3
OOxygen
O Quartz (var: Chalcedony)SiO2
O Quartz (var: Amethyst)SiO2
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O CalciteCaCO3
SiSilicon
Si Quartz (var: Chalcedony)SiO2
Si Quartz (var: Amethyst)SiO2
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
CaCalcium
Ca CalciteCaCO3

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
MRNF - Rapport sur les activités d'exploration minière au Québec

Other Regions, Features and Areas containg this locality

North America PlateTectonic Plate

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