The phrase "at such depth" is correct and usable in written English.
It can be used when discussing the extent or level of something, often in a physical or metaphorical context.
Example: "The research revealed that the coral reefs thrive at such depth, where sunlight barely penetrates."
Alternatives: "at this level" or "at this extent".
Dispersants have never been used in an oil leak of this size a mile under the ocean, and their effects at such depth are largely unknown.
In 2013, an aftershock of an earthquake that occurred 380 miles below the Sea of Okhotsk was inferred to have done so, but the speed and length of a rupture are hard to measure precisely at such depth.
"Only a novelist with Gordimer's gifts can offer so much information, at such depth, about the cataclysmic battles and the rough transition to peace that she and her characters have witnessed," Francine Prose wrote in the Book Review.
Only a novelist with Gordimer's gifts can offer so much information, at such depth, about the cataclysmic battles and the rough transition to peace that she and her characters have witnessed, a war she survived to report on to us, her grateful readers.
When it gets there, Cape Hatteras will launch Nereus, an unmanned submarine, named after an ancient Greek sea god, that is capable of withstanding the pressure at such depth (it went down 11km on a previous expedition).The Caribbean may seem an unlikely place to study extraterrestrial life, but this is no junket.
At such depth water strongly interacts with rocks for relatively longer period and acquires silica in high proportions.
One is that ice melts more easily at the high pressures found at such depths.
Duvall, naive herself, is privately stunned at such depths of naiveté in another.
Extracting oil at such depths is both a technical and financial challenge.
Explosive volcanism at such depths would be very unusual, said Robert A. Sohn of the Woods Hole Oceanographic Institution in Massachusetts.
Because the waters tend to be very clear, there can be enough sunlight at such depths to support kelp growth.
