Results for “marginal”

mound spring

Natural, isolated, relict artesian springs found in arid, outback Queensland and South Australia. Water stored in deep aquifers seeps to the surface through fault lines in the rock, and the sediments and salts within the spring water form elevated mounds as it evaporates. Most such springs support marginal plant growth that help stabilise the sediment and provide shelter for animals. In South Australia mound springs form an arc of about 400km along the south-western edge of the Great Artesian Basin, although many have disappeared in the last 100 years as a result of water extraction.

Used in 1 profile

preopercle

Bone forming the posterior and lower margins of the cheek; the anteriormost bone of the opercle. Also known as the preoperculum.

Used in 62 profiles

principle caudal-fin rays

Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.

Used in 1 profile

ridge

In morphology, an elongate, raised strip, margin or border on a bone, tooth, tissue membrane, etc.

Used in 60 profiles

rift lake

Type of lake that forms in a rift zone or rift valley and often very deep with steep cliffs around the margins, also known as a rift valley lake, sag pond, or fault-trough lake. The largest freshwater lakes in the world are all of this type. Also used in the aquarium hobby in reference to the Rift Valley lakes of the East African rift.

Used in 32 profiles

serrae

Plural of serra. Usually used in reference to a saw-like edge or margin.

Used in 31 profiles

serrate

Having a notched or sawlike edge or margin.

Used in 100 profiles

sinuate

Having a wavy margin with strong indentations.

snout length

Distance between the tip of the upper jaw and anterior margin of the orbit.

Used in 30 profiles

trailing edge

The rear edge or margin of a moving body such as a fish fin.