Hartman Reserve Nature Center
Gorge
This Earth
cachr is in Hartman Reserve Nature Center North
Unit
Hartman Reserve Nature
Centeris a 300 acre
wooded isle located in the heart of metropolitan Black Hawk County.
Hartman lies in the center of the Waterloo, Cedar Falls area. It
offers many activities and experiences to all its visitors. Hartman
Reserve Nature Center is an entity of the Black Hawk County
Conservation Board. Since our creation in 1976, Hartman Reserve
Nature Center has been designated as an
Iowa Watch able Wildlife
Siteand an
Important
Bird Area. Deer, otter
turkeys, pileated woodpeckers, red-shouldered hawks, foxes,
vultures, and bald eagles are some of the wildlife you might
see.
Gravity Flow
erosion! As you
enter the site you wiil see Gravity Flow ersion all over as
you go down to the posted
coordinates.
Mass Movementis the down slope movement of rock and sediments, mainly
due to the force of gravity. Mass Movement is an important part of
the erosional process, as it moves material from higher elevations
to lower elevations where other eroding agents such as streams and
glaciers can then pick up the material and move
it to even lower elevations. Mass-Movement processes are always
occurring continuously on all slopes; some mass-movement processes
act very slowly; others occur very suddenly, often with disastrous
results. Any perceptible down-slope movement of rock or sediment is
often referred to in general terms as a
landslide. However, landslides can be
classified in a much more detailed way that reflects the mechanisms
responsible for the movement and the velocity at which the movement
occurs. One of the visible topographical manifestations of a very
slow form of such activity is a
scree slope.
Slumpinghappens
on steep hillsides, occurring along distinct fracture zones, often
within materials like clay that, once released, may move quite rapidly
downhill. They will often show a spoon-shaped
isostatic depression, in which the
material has begun to slide downhill. In some cases, the slump is
caused by water beneath the slope weakening it. In many cases it is
simply the result of poor engineering along
highways where it is a regular
occurrence.
Surface creep is the slow movement of soil and rock debris by gravity
which is usually not perceptible except through extended
observation. However, the term can also describe the rolling of
dislodged soil particles 0.5 to 1.0 mm in diameter by wind along
the soil
surface.
In an e-mail to me:
1.Tell me the
width and depth and how long the gorge is!
2.
Describe to me the surface at the bottom of the Gorge looks like.
(You see Rocks, downed tree’s, etc.)
3.
Based on what you might know already, or what I have described in
this Earth cache’s write up, how can the gorge have influenced the
area?
And
4.When you log this cache, please upload a picture of yourself/team
with your GPS clearly visible at the near the posted coordinates at
the bottom of the gorge.
Bottom Deck would the best. Do not hurt the surrounding
area!
Special Thanks to
ED
Gruenwald director of Hartman Reserve Nature Center for
allowing me to place this
earthcache.
