Dallas

Is Dallasite Jasper?

Dallasite is a jasper breccia made up of quartz, altered basalt, epidote and pumpelleyite. It is thought to have been formed as pillow lava underwater. What type of rock is Dallasite? Dallasite is a variety of Jasper composed of a breccia of colourless Quartzite, green Epidote, Pumpellyite and altered basalt minerals. This colourful green and …

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Is Dallasite A Word?

Dallasite is a breccia made of subequant to rectangular or distinctly elongate, curvilinear shards that represent the spalled rims of pillow basalt (see: Hyaloclastite). This material is commonly partly altered to chlorite, epidote, quartz and carbonate, for which the local term ‘dallasite’ has been coined. What is in Dallasite? Dallasite is a jasper breccia made …

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