Xenoblastic refers to metamorphic mineral with poorly formed crystal faces (equivalent to anhedral). Foliation is a general term for pervasive planar structures. Typically the result of fine-scale compositional layering and alignment of minerals.
1 Snowy owls live farther north than any other kind of owl in North America! 2  Fine Feathers! 3  A dense coat of feathers keeps a snowy owl warm during frigid winters. 4  Even the owlâs toes and claws are thickly feathered! 5  Early Risers. 6  Most owls sleep during the day and are active at night.
The great gray owl lives in the Arctic where even in summer, its meal can be buried under inches of snow. To hunt, it locates its favorite prey, mice and other small rodents, by listening for movement far below. The feathers surrounding each eye function like a dish antenna, directing sound to the ears.