The phrase 'marked progress in' is correct and usable in written English.
You can use it to describe an impressive amount of progress that has been made in some endeavor. For example, "The students have made marked progress in their mathematics studies over the last six months."
He said China will announce post-2020 actions on climate change "as soon as we can" and that these would include "marked progress in reducing carbon intensity" and "the peaking of total carbon dioxide emissions as early as possible".
President Bush's decision was even more noteworthy because it not only marked progress in his own thinking, but it also went against some of the most powerful elements of his political base.
The program showed marked progress in terms of improving surveillance, reducing endemic villages, and increasing intervention coverage.
In parallel, there has been marked progress in the development of therapeutic options in CLL (extensively reviewed elsewhere [ 10- 12]).
Despite marked progress in the treatment, most patients still die of the disease within several months to a few years.
Although there has been marked progress in understanding the pathogenesis of the disease over the last several years, the main causes of UC remain unclear.
In a sense, that marks progress in the world's struggle against hunger.
It marks progress in the rogue state's missile programme and in mastering the technology for an intercontinental ballistic missile capable of delivering a nuclear warhead.
Perhaps the most important way in which historical Bayesianisms mark progress in theorizing about historically sensitive theories of rationality is that, of the theories presented, they have the best claim to being epistemically well-grounded.
She could mark progress in job applications filled out.
Six months on, Myanmar marks progress in recovery from Cyclone Nargis NEW YORK, USA, 4 November 2008 – In early May of this year, hundreds of thousands of people in south-western Myanmar's Irrawaddy Delta were forced from their homes by Cyclone Nargis.
