occluded front
Melted rock beneath Earth's surface is known as magma. Magma forms in the Earth's mantle and can rise to the surface, where it is then called lava. Magma can also cool and solidify beneath the surface, forming igneous rocks.
When two cool air masses cut off a warm air mass from the ground, a stationary front forms. Stationary fronts occur when the boundary between two air masses stalls and neither one advances. This can lead to prolonged periods of cloudy, rainy weather.
Intrusive igneous rocks, such as granite, take the longest time to cool because they form beneath the Earth's surface where heat dissipates slowly. This slow cooling process allows large crystals to form in the rock.
A cold front is formed when a cool air mass displaces a warm air mass. Cold fronts typically bring cooler temperatures, thunderstorms, and sometimes severe weather as the denser cool air displaces the warm air along the front.
A stationary front may form when cool air and warm air meet, causing the two air masses to remain in place and not move past each other. This can result in a prolonged period of cloudy and rainy weather.
A warm front is the type of front where warm air is lifted over a mass of cooler, denser air at the surface. This lifting action leads to the warm air being unable to move forward and being cut off from the ground by the cool air beneath it.
An occluded front is formed when a fast-moving cold front catches up to a slow-moving warm front and lifts the warm air mass off the ground. This creates a complex weather system with both cold and warm air masses aloft, while cool air is found below.
A cold front.
STatioNary Front :):
STatioNary Front :):
cold front
a-plus an occluded front
A front forms. The type of front depends on which air mass is advancing. If the cool air mass advances, it is a cold front. If a warm air mass advances, it is a warm front. If neither advances, it is a stationary front.
occluded
a-plus an occluded front
occluded
occluded