Extended Vocabulary - Plate Tectonics

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Across
  1. 1. This principle states that layers of rock are superimposed, or laid down one on top of another.
  2. 10. The "Age of Early Life" continents formed and our modern atmosphere developed, while early life evolved and flourished during this time.
  3. 13. _____ ________ occurs when the nucleus of a radioactive atom spontaneously transforms into an atomic nucleus of a different, more stable isotope.
  4. 17. The "Age of Reptiles" Pangaea began separating into the modern continents, and the modern Rocky Mountains rose during this time.
  5. 18. The mineralized sediment that fills the mold recreates the shape of the remains.
  6. 19. The preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud.
  7. 20. The mineralized impression of the organism left in the sediment is called a ______.
  8. 21. The process of forming something by forcing or pushing it out, especially through a small opening.
Down
  1. 2. The "Age of Ancient Life" Fish diversified and marine organisms were very abundant during this time.
  2. 3. The "Age of Mammals" North America's characteristic landscapes began to develop during this time.
  3. 4. A type of geologic contact caused by a period of erosion or a pause in sediment accumulation, followed by the deposition of new sediments.
  4. 5. The “calendar” for events in Earth history.
  5. 6. This occurs when the organic matter is completely replaced by minerals and the fossil is turned to stone.
  6. 7. The time required for one-half of the radioactive (parent) isotopes in a sample to decay to radiogenic (daughter) isotopes.
  7. 8. The action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
  8. 9. The approximate age determination of rocks, fossils or minerals made by comparing whether the material is younger or older than other surrounding material.
  9. 11. The measurement of geologic age in years.
  10. 12. A fossil that provides indirect evident evidence of ancient plants or animals, such as footprints, nests, burrows, or feces.
  11. 14. It is a type of fossil found in any rock when organic material is compressed, leaving only a carbon residue or film.
  12. 15. A mineral is used in geology to determine the degree of metamorphism a rock has experienced.
  13. 16. An event or a time that begins a new period or development.
  14. 19. A fracture or zone of fractures between two blocks of rock