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Needle ice phenomena play a particularly significant role in patterned ground in periglacial environments. [8] The growth of needle ice lifts a detached, frozen soil crust riding on top of the layer of ice. When the crust and the ice melt, the soil surface settles back irregularly. This phenomenon is linked to erosion, particularly on ...
Photograph taken 21 March 2010 in Norwich, Vermont. Frost heaving (or a frost heave) is an upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil (the freezing front or freezing boundary).
The displacement of solids (sediment, soil, rock and other particles) usually by the agents of currents such as wind, water, or ice by downward or down-slope movement in response to gravity or by living organisms (in the case of bioerosion). erratic A piece of rock that deviates from the size and type of rock native to the area in which it rests.
Soil containing high levels of organic materials are often more resistant to erosion, because the organic materials coagulate soil colloids and create a stronger, more stable soil structure. [45] The amount of water present in the soil before the precipitation also plays an important role, because it sets limits on the amount of water that can ...
The wall of this ice tube is about 0.1 mm (0.004 in) and the width 5 mm (0.2 in). As a result of this growth process, the interior of a growing icicle is liquid water. The growth of an icicle both in length and in width can be calculated and is a complicated function of air temperature, wind speed, and the water flux into the icicle. [3]
Mold on houseplant soil may look problematic, but it’s easy to reverse the damage. Take these steps to cure your moldy houseplants and prevent future infections.
Unidentified water mold on dead larval mayfly. A culture of Achlya sp. (Saprolegniales) isolated from a stream. Sea trout suffering from UDN with secondary Saprolegnia infections. Many oomycetes species are economically important, aggressive algae and plant pathogens. [13] [14] Some species can cause disease in fish, and at least one is a ...
Aquatic fungi that grow in water, but spread their spores via air. [11] aethalium . pl. aethalia. The relatively large fruiting body of many slime mold s (Myxomycetes). From Gr. aíthalos, soot. [12] agaric An agaric, with gills on the underside of the pileus A member of the order Agaricales; a mushroom or toadstool. Contains many iconic and ...