palagonite การใช้

• A composite of sideromelane aggregate in palagonite matrix is called hyaloclastite.
• These layers have red-orange-brown colours and contain some palagonite.
• Some rocks have undergone palagonite-forming alteration.
• The canyon was created by progressive erosion by flowing water from glaciers through the rocks and palagonite over millennia.
• All the islands have been built up in submarine eruptions and consist of alternating layers of palagonite tuff and lava.
• The cone consists of steeply dipping layers of mainly palagonite, formed by the alteration of the original basaltic glass.
• Fragments of these glasses are usually surrounded by a yellow waxy layer of palagonite, formed by reaction of sideromelane with water.
• Sideromelane often forms during explosions of submarine volcanoes and subglacial volcanoes, and often occurs as fragments embedded in a palagonite matrix, forming hyaloclastite deposits.
• "' Palagonite tuff "'is a tuff composed of sideromelane fragments and coarser pieces of basaltic rock, embedded in a palagonite matrix.
• "' Palagonite tuff "'is a tuff composed of sideromelane fragments and coarser pieces of basaltic rock, embedded in a palagonite matrix.
• On the lower flanks of the cone, the rocks are mostly palagonite bombs from fire-fountaining that preceded the filling of the crater with lava.
• Palagonite soil is a light yellow-orange dust, comprising a mixture of particles ranging down to sub-micrometer sizes, usually found mixed with larger fragments of lava.
• On top of these volcanic layers are sedimentary materials, sometimes of great thickness, formed mainly of sand, pebbles, and large blocks of rolled palagonite with abundant cavities.
• The products of Surtseyan eruptions are generally oxidized palagonite basalts ( though andesitic eruptions do occur, albeit rarely ), and like Strombolian eruptions Surtseyan eruptions are generally continuous or otherwise rhythmic.
• The internal structure of this volcano, which is in height above sea level ( at Pico das Cruzinhas ), is marked by layers of basaltic pyroclasts of various thicknesses ( between centimetres and metres thick ) forming a lithificated palagonite tuff.