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Introduction To My Pet Rock

Published on Nov 18, 2015

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PRESENTATION OUTLINE

1.

SLATE:

  • Slate is a metamorphic rock that forms from mudstone or shale.
  • The mudstone or shale normally contains clay or volcanic ash.
  • Slate is unique in that it does not require any type of cementation to hold its particles together.
  • It has a very attractive appearance and it is also durable.
Photo by Bombardier
2.

MICAS:

  • The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having close to perfect basal cleavage.
  • All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition.
  • The nearly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.
Photo by MAURO CATEB
3.

FELDSPAR:

  • Feldspar is a blanket term for a very large group of minerals that are extremely abundant on Earth.
  • Around 60% of the Earth's crust is made up of these minerals, in fact, and they have numerous uses for humans, ranging from scouring solutions to glassware
  • The distinguishing feature of minerals in the feldspar group is that they are comprised of silicates of aluminum blended with other metals like potassium, calcium, sodium, and sometimes barium.
Photo by Ron Schott
4.

BEDROCK:

  • Bedrock (also termed Bed rock ) is a layer of undisturbed rock usually located beneath a surface layer of soil or other material.
  • In areas of high erosion , bedrock may become exposed to the surface.
  • Bedrock can be of igneous, sedimentary, or metamorphic origin and forms the upper surface of the rocky foundation that composes the earth's crust .
Photo by bill barber
5.

TECTONIC PLATES:

  • Plate tectonics (from the Greek word for "one who constructs") is a theory of geology developed to explain the phenomenon of continental drift, and is currently the theory accepted by the vast majority of scientists working in this area.
  • In the theory of plate tectonics the outermost part of the Earth's interior is made up of two layers, the outer lithosphere and the inner asthenosphere.
Photo by WorldIslandInfo.com

David Aragon