LONDON — When a giant fatberg was discovered in the sewer of a small coastal town in southwestern England last year, the company that manages the pipes was so mystified by the greasy mass of solidified fats and waste materials that it enlisted the help of scientists to discover what it was made of.

The grisly results of an autopsy were made public on Friday, and they were not pretty, but held some surprises. Stuck within the massive, stomach-churning lump were wet wipes, as expected; oils; sanitary products; and even a set of false teeth.

Fatbergs are more commonly associated with large cities such as London and New York. Their contents can become a taxonomy of the habits of the inhabitants of nearby towns or cities.

When a 140-ton fatberg was found in the East End of London in 2017, a subsequent autopsy revealed that the city’s residents had been flushing condoms, syringes and narcotics — including cocaine and ketamine — down the toilet, and they were all lodged inside it.