The phrase "a mountain of material" is correct and usable in written English.
It can be used to describe a large quantity of information, resources, or items that are overwhelming or extensive.
Example: "The researcher had to sift through a mountain of material to find the relevant data for her thesis."
Alternatives: "a wealth of material" or "an abundance of material".
Faced with a mountain of material, she presents the life chronologically.
Along with their heartfelt letter, the developers released a mountain of material showing the development process the game went through.
"Good biographers spend years amassing a mountain of material only to spend still more years compressing that information" into a smart, readable narrative.
So far a mountain of material has been removed, more than 300,000 tons of soil, rock and concrete — enough to top off Giants Stadium, or to fill a line of dump trucks 45 miles long.
Drexler, formerly a medical columnist for The Boston Globe Magazine, has absorbed a mountain of material and distilled it into an authoritative, well-paced, vividly written book that will scare the pants off you.
By the time the announcement was made, it was anything but a surprise, and Republicans were ready, armed with what Democrats assumed was a mountain of material mined from Mr. Biden's 36 years in the Senate and his presidential campaign.
Bill Chase, Geneva A mountain of debt?
I have a mountain of leftover material that has to be sorted out".
A faithful, diligent researcher, he presents a mountain of documentary material on vice and police corruption, but the gay, gaudy Tenderloin never quite takes on a life of its own.
It is easy to imagine Mr. Shearer faced with a mountain of wonderful material, and easy, too, to imagine the tremendous labor required to turn it into this fitfully entertaining molehill of a movie.
On weekends, he consumes a mountain of printed material; he arrives on Monday with a penned list of questions for subordinates (he carries the list in his breast pocket, crossing off items as he grabs people in the hallways).
