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ponar device

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GOL Ponar Paper
Ashley Southall
GOL - 111 Lecture
10/22/2014
Writing Assignment
Ponar
In my experience of an oceanography cruise, there was so much to see and learn all at once.
Collecting data, recording data, and actively participating in using various objects to collect the
data was very interesting. Nikon bottle, Refractometer, Secchi Disk, Plankton and Otter-Trawl,
to name a view, were the various instruments we used to collect the data we need as the
science crew. In analyzing the various aspect of the ocean, the Ponar was the most interesting
object we used. It appeared to be this big heavy object that was thrown into the ocean and
pulled back up and opened for review. However, that is only part of the description of a Ponar, it
is more than just that and is very important in collecting ocean sediments.
A Ponar is a device that is used to grab sediments at the bottom of the ocean to be collected
and analyzed. The name Ponar, according to the Grand Valley State University manual, comes
from the Great Lakes scientists, Charles E. Powers, Robert A. Ogle, Jr., Vincent E. Noble, John
C. Ayers, and Andrew Roberson. According to the Grand Valley State University manual, it
states that “the Ponar grab sampler is lowered to the bottom where contact with the bottom sets
off the trigger and a strong spring snaps the jaws shut trapping a sample of the bottom inside.” It
is held together by two important pins, which are the safety pin and the spring pin. These pins
are important because they make sure that the Ponar opens and closes securely so that
sediments can be collected properly. This equipment was very heavy and had to be thrown into
the ocean by the ship’s crew.
Ponars collect sediments such as sand, gravel, clay, and grains. The Ponar allows science
crews to determine the grain size, color, sorting, roundness, composition, and shells/bio
material. On the cruise, we collected fine grain size sand. In the Grand Valley University
manual, sediments can be identified according to sediment class. The classes are very course,
medium, or very fine. The sediment classes determine the diameter as well. The sediments that
we collected were a dark gray color, which according to the munsell code book, was 5y41. The
sorting of the sand was well sorted and the roundness of the grains were well rounded and high
sphericity. The shell/bio material was shell fragments under the microscope.

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 GOL Ponar Paper Ashley Southall GOL - 111 – Lecture 10/22/2014 Writing Assignment Ponar In my experience of an oceanography cruise, there was so much to see and learn all at once. Collecting data, recording data, and actively participating in using various objects to collect the data was very interesting. Nikon bottle, Refractometer, Secchi Disk, Plankton and Otter-Trawl, to name a view, were the various instruments we used to collect the data we need as the science crew. In analyzing the various aspect of the ocean, the Ponar was the most interesting object we used. It appeared to be ...
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