Qu'Appelle Valley Geolog Stop 4 - Lebret Terrace
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Terraces are bench-like surfaces that break the continuity of the valley slope. Such terraces are remnants of former valley bottoms. In the case of the Lebret Terrace, when the Qu'Appelle Valley was formed, a layer of sand and gravel was deposited on the valley floor. Later on, a spillway eroded a portion of the sand and gravel deposits and leaving others, creating two separate levels of ground.

Diagram of Qu'Appelle Spillway Diagram of Terrace

Unfortunately, Stop 4 has been changed by construction and urbanization of the area. Currently the Lebret Terrace is being used as a gravel pit, and there has been much disturbance and upheaval to local vegetation. Most of the plants on the terrace now are early succession plants. However behind the gravel pits, on the north side, the land has been largely undisturbed and numerous amounts of late succession plants are growing there.


Picture of View from Stop 4

Plant species found at stop 4:

Alfalfa Hairy golden-aster Slender wheatgrass
Awned northern wheatgrass Long-headed coneflower Smooth aster
Black-fruited chokecherry Low goldenrod Smooth brome
Blue lettuce Low prairie rose Stiff goldenrod
Bluebur Manitoba maple Stinkweed
Canada thistle Many-flowered aster Trembling aspen
Common pepper-grass Northern awnless brome Western snowberry
Crested wheatgrass Northern wheatgrass White sweet-clover
Dandelion Pasture sage Wild licorice
Dotted blazingstar Pineappleweed Wild oat
Flixweed Plains wormwood Wolfwillow or Silverberry
False ragweed Prairie sage Wood blue grass
Foxtail barley Red-osier dogwood Wood's rose
Graceful (Canada) goldenrod Saskatoon Yarrow
Gumweed Silverleaf psoralea Yellow sweet-clover


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Page last updated on 2004-10-08
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