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Pseudo-stromatolite, extra largeLocale: Morocco Approx dimensions: 7 x 6. 25 x 4" Approx weight: 9 lbs 12. 5 oz A stromatolite is a sedimentary fossil structure made by prehistoric bacteria colonies, typically cyanobacteria. Stromatolites in fact are still living and forming in some parts of our world today, including Australia, and are among the earliest forms of lifeand fossilson our Earth. The fossils form in shallow water conditions of lakes or salt water shores. First,

which can produce a soft orange-cream druzy coating

The starbursts in the rhyolite are spherulites: minerals composed of dense radial needle-like growth from a point to create a sphere (hence "spher"ulite)

Approx weight: 57g

Shiny darker black spires with botryoidal surfaces surround the edges

A snow-drift of white quartz flows out of the darkness

Coffee-brown staining may be iron

and they are very bright when exposed to a powerful 365nm UV light

Approx point length: 3

Xenolith means there are pockets of ‘foreign’ material

There are small pock marks covering the surface of one face

" there is a cluster of fine needle-like growth crystals which I don't believe is hyalite

Studied closely

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