Threadlike filamentous green algae growing in the shallows of Copley Retention Dam. These soft strands consist of a chain of cells, giving a thread-like appearance. Oxygen production as a by-product of underwater photosynthesis creates buoyancy, causing the strands to incline toward the surface.Continue reading “Filamentous Green Algae”
Sand from the red dunes in the plains to the west of Wilpena Pound, predominately hematite stained silica. Magnification 20x.
The hematite and magnetite rich magnetic sand of Yudnamutana.
Malachite pseudomorph after azurite crystals.
Goethite replacement of pyrite crystals.
Magnification 20x. Continue reading “Dihydrogen Monoxide crystals, also known as frost”
Schistose rocky outcrop.
Mica schist and tourmaline.