frost line


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frost line

[′frȯst ‚līn]
(geology)
The maximum depth of frozen ground during the winter.
The lower limit of the permafrost.
(materials)
In polyethylene film extrusion, a ring-shaped area with a frosty appearance at the point where the film reaches its final diameter.

frost line

An imaginary line indicating the depth of frost penetration in the ground.
References in periodicals archive ?
Caption: FIG 2 Here, a tilted frost line resulted in collapsing wrinkles that vary with the oscillating hauloff rotational position or bubble position.
They are 5 to 6 feet underground and lie beneath the frost line, but that matters little when temperatures drop so much, Peckinpaugh said.
In contrast, terrestrial frogs and toads usually hibernate on land, often burrowing into the ground below the frost line, or--for frogs like the wood frog that are not adapted to digging their own burrow--seeking crevices in logs or rocks, or scooching down in leaf debris (though this is not a guaranteed way to prevent freezing).
* examination of piping buried above the frost line for evidence of deflection at joints during opportunistic excavations for other work, and
In the northern states and provinces, leeches hibernate in winter by burrowing into the bottom below the frost line. Many species come out of hibernation soon after ice recedes from their shallow, weedy, eutrophic habitats and begin to feed actively in 34[degrees]F water.
Just in time for the holidays, the limited edition Cranberries and Frost line from Febreze eliminates odors while leaving a crisp, comforting scent.
Living Above the Frost Line, a collection of poems by Nancy Simpson, initially brings to mind the poems of Stanley Kunitz, who loved his garden and made a metaphor of gardening and writing in The Wild Braid.
It reminds me of that Robert Frost line, "miles to go before I sleep." I wonder if he had a poetry editor waiting on him for a hastily scribbled piece the next morning.
Patented split sensors are said to enable the airflow intake and exhaust to react to the slightest changes in bubble size at or below the frost line where the bubble size is not yet final.
If you cannot get the rods deep enough--below the frost line and to the water table--install a cluster of shorter rods.
Northwest breezes keep vines dry and mildew-free, even following a rainy winter, and vineyards are above the frost line, negating the need for frost control.
Within the solar nebula, lies an imaginary temperature line called the frost line. Inside the frost line, closer to the Sun, planetary materials heated up and condensed to form the rocky planets.