The phrase "below a depth" is grammatically correct and can be used in written English.
It is typically used when discussing depth or distance below a surface or point of reference. Example: The submarine descended to a depth of 200 meters, well below the surface of the ocean. In this sentence, "below a depth" is used to indicate a specific distance (200 meters) below a point of reference (the surface of the ocean).
Much of the Black Sea below a depth of a few hundred metres is in this condition.
A small, central part of the core, however, below a depth of about 5,100 km (3,200 miles), is solid iron.
This surface movement exceeds a westward flow of heavier, colder, and more saline water, which takes place below a depth of about 400 feet (120 metres).
Over several research voyages, oceanographers had collected thousands of samples of sea water from the deep ocean (below a depth of 500 metres) around the world.
Tristan Guillot and colleagues study the even gravitational harmonics and find that, below a depth of about 3,000 kilometres, Jupiter is rotating almost as a solid body.
The anchoveta prefer the colder water, and if they descend below a depth of six or seven feet the pelicans cannot reach them.
A snow zone forms, limited from below, at a depth where the core temperature is higher than the melting temperature, and the iron snow particles remelt.
Below, extending to a depth 42 feet beneath the sidewalk, and occupying an additional area of 75 x 242 feet running toward Broadway, were the basements, which contained the engine room, laundries, kitchens, and even the Waldorf-Astoria Cigar Company. Waldorf-Astoria Cigar Company
Secondly, in the stone below the repair mortar, the RH remained relatively constant and high, not going below 87.4% at a depth of 2.5 cm.
A recent geophysical study, in particular, showed a marked increase of Vp/Vs below the SPTS, at a depth of 10 15 km, likely in relation to endogenic fluid trapped below the evaporitic sealing level84.
Specimens were studied first hand by direct imaging of bone surfaces and of the microanatomy of bone immediately below the surface to a depth of ca. 50 μm.
