Basalt quarry, Měrunice, Teplice District, Ústí nad Labem Region, Czech Republic
White aragonite layers are enveloping basalt boulder in "altered" zone (or pyroclastic material?). Maximum thickness of those laeyrs was 3 cm. State of 2011.
© Jakub Jirásek, 2011
Fibrous aragonite. Size 6,5×2,5 cm. Collection of author.
Fibrous aragonite. Size 7×5,5 cm. Collection of author.
Basalt quarry at Stříbrník Hill near Měrunice. Note typical columnar structure. State of 2011.
Basalt quarry at Stříbrník Hill near Měrunice. In the centre is rest of "altered" zone (or pyroclastic material?). State of 2011.
Basalt quarry at Stříbrník Hill near Měrunice. State of 2011.
Basalt quarry at Stříbrník Hill near Měrunice from the south. State of 2020.
© Jakub Jirásek, 2020