This method allows geologists to match rock units across large areas even when some rock units are missing.

  1. Cross cutting relations
  2. Fossil correlation
  3. Original horizontality
  4. Superposition
  5. Unconformity


Fossil correlation

Environmental & Atmospheric Sciences

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Under the precautionary principle approach, chemicals are assumed safe until scientific research could support otherwise.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

The rock shown here, with sediment just visible to the naked eye, is a



A) sandstone.
B) shale.
C) conglomerate.

Environmental & Atmospheric Sciences

The concept of ____ recognizes that some climate change is unavoidable because we have waited too long to act and people have to react to some of its harmful effects.

A. administration B. mitigation C. adaptation D. elimination E. equivocation

Environmental & Atmospheric Sciences

Which of the following amino acids absorbs UV radiation at 280 nm?

A) arginine B) alanine C) leucine D) tyrosine

Environmental & Atmospheric Sciences