The phrase "and descends in a" is correct and usable in written English.
It can be used when describing a movement or transition that goes downward in a particular context, such as in a narrative or descriptive writing.
Example: "The path winds through the forest and descends in a gentle slope towards the river."
Alternatives: "and falls into a" or "and leads down to a".
The elevator that runs from the ground floor to the fifth floor will be replaced and will ascend and descend in a new, fire-resistant shaft.
After Robison caught the tentacle and descended in a submersible to the same spot, he said, "It occurred to me that there was a pissed-off squid out there with a grudge against me".
In February, 1968, she joined a team of scientists in the Bahamas and descended in a vehicle called Deep Diver, which Link had designed and which was the first modern submersible with a lockout chamber, permitting divers to leave and return to the vehicle underwater.
Dilute pyroclastic density currents (surges) were observed at the southern part of the summit area and descended in a SSW direction as far as 2 km from the source (Yamamoto 2014).
In 2001 an Italian reached the summit and descended in an astonishing 8 hours and 30 minutes.
And as the driver rows us on, a blind man misses his stop and descends in silence into a night of unfamiliar dreams.
Since the velocities coincide with the data by the rawin sonde and the theoretically estimated gradient wind, it is concluded that the gradient height varies successively and it descends in an extraordinary case to a height less than 100 m in typhoon winds.
Simply cut a small wedge shape about one inch (2.5cm) high at the highest end, and descending in wedge shape (like a wedge of cheese).
Comparing lines 1 and 2 (with flat elevation profiles) to lines 3, 4, and 5 (all ascending in direction A and descending in direction B, respectively) confirms this conclusion.
Climatologists have long known that the Hadley circulation, which consists of warm air rising in the tropical regions and descending in the mid-latitudes plays a dominant role in global climate because the world's major deserts all lie in the descending region of the Hadley circulation.
