Transcript KT Boundary - Issaquah Connect

There are hints for the worksheet located on the last
slide of this PowerPoint Presentation.
Mount Rainier’s Autobiography
 Strata are layers of
rock and other
sediment.
 Sediment can be
soil, glacial
deposits, volcanic
ash, lava flows,
sand, cinders, etc.
 The oldest layers of
rock are deeper and
the newest layers of
rock are closer to
the surface (for the
most part).
 The deeper you go,
the older the rock.
 The K-T boundary is a layer that
was deposited about 65 mya. It
has very high levels of iridium (a
radioactive element).
 A Tibetan word
that means
mudflow/landslide.
 Lahars can be
caused by
earthquakes, floods
and eruptions.
 Lahars can travel
for dozens of miles.
 An ash cloud from a
volcanic eruption
that settles over a
few days or weeks
and forms a rock
layer.
 Tephra can travel
hundreds of miles.
 Mt. Mazama is
the name given to
the volcano that is
now Crater Lake.
 Crater Lake is in
central Oregon.
Question 3: IF YOU HAVE THE ANSWER OF 15O YEARS
AGO (OR 1866), TAKE ANOTHER LOOK.
Question 4: IF YOU SAID LIKELY, TAKE ANOTHER LOOK.
Question 5: IF YOU SAID LIKELY, TAKE ANOTHER LOOK.
Question 6: YOU NEED TO HAVE THE CORRECT ANSWER
(YEAR) FOR #3 TO GET THIS ONE RIGHT.
Question 7: WHAT NEEDS TO HAPPEN TO HAVE
GLACIERS AND WHAT NEEDS TO HAPPEN TO HAVE
GLACIAL DEPOSITS?
Question 10: DON’T OVER THINK THIS ONE. NOT ALL
CATASTROPHIC PROCESSES NEED TO BE VOLCANIC
IN ORIGIN.
Question 12: IF YOU SAID YES, TAKE ANOTHER LOOK.