Layering of water, of different temperatures/oxygen concentrations that takes place during the summer months The uppermost layer (the epilimnion) consists of warm, well oxygenated water which is circulated through wave action A rapid decrease in water temperature characterizes the middle layer of water (the thermocline) Many fish occupy this layer during daylight hours The lower layer of water (the hypolimnion) consists of cold, oxygen poor water Temperature sensitive fish (lake trout, lake whitefish) retreat to this layer during summer months
The process of preparing a tree seed for sowing by dispersing the seeds in sand and subjecting them to cold conditions, outdoors or artificially in a freezer or - refridgerator This encourages germination
lack of adhesion between different coats It occurs when several coats of the same coating have been applied later than the suggested maximum recoating time, thus affecting adhesion between coats
Stratification is the division of something, especially society, into different classes or layers. She was concerned about the stratification of American society. Layering that occurs in most sedimentary rocks and in igneous rocks that are formed at the Earth's surface, such as from lava flows and volcanic deposits. The layers (strata) may range from thin sheets that cover many square miles to thick lenslike bodies that are only a few feet wide
1 any nonuniform vertical distribution within vegetation, may be continuous (as in gradients in midday humidity from ground to outer canopy) or discontinuous; if the latter, individual strata can be defined As cited in
The process of artificially breaking seed dormancy by placing them in layers of moisture-retaining media, under generally cool and moist conditions, for a period of time, so as to simulate winter conditions Basically, you try to fool the seed into thinking it has endured a long, North Country winter when, in fact, it has just spent a couple of months in your fridge
The deposition of material in successive layers in the growth of a cell wall, thus giving rise to a stratified appearance
Layers of deposits that provide archaeologists with one of the major tools or clues for interpreting archaeological sites (stratigraphy) Over time, debris and soil accumulate in layers Color, texture, and contents may change with each layer Archaeologists try to explain how each layer was added--if it occurred naturally, deliberately (garbage), or from the collapse of structures--and they record it in detailed drawings so others can follow
{i} formation of strata, deposition in layers; state of being separated into layers; state of being divided into social classes