The phrase "a remarkably broad" is correct and usable in written English.
It can be used to describe something that has a wide range or scope, often in a positive context.
Example: "The study provided a remarkably broad overview of the topic, covering various aspects that had not been previously addressed."
Alternatives: "an impressively wide" or "a notably extensive".
Smil has written a remarkably broad and thorough book.
Using increasingly precise diagnostic tools, he discovers a remarkably broad spectrum of pathology.
But even the smaller ones share a spirit and a remarkably broad cast.
American photographer who achieved distinction in a remarkably broad range of roles.
It will be a keystone work for all those interested in the evolution and development of play, but it covers a remarkably broad range of other topics.
The data have revealed a diverse and geologically active world displaying a remarkably broad range of landforms, albedos [surface reflectivity], colors, compositions, and surface processes at play.
Some examples: Mitchell Kapor, co-founder of the Electronic Frontier Foundation, helped catalyze a remarkably broad-based public discussion of the social values at stake as we create the information infrastructure.
Importantly, reduced activity of both of these pathways, whether through genetic manipulation or chemical inhibition, can extend the lifespan in mice (reviewed in (Fontana et al., 2010; Kenyon, 2010), and can produce a remarkably broad-spectrum improvement in health during middle and old age (Selman et al., 2008, 2009).
When the intratumoral distribution of AuNRs was assessed, the NSC.AuNRs had a remarkably broader and more even distribution throughout the tumor as compared to the free AuNRs.
They found remarkably broad variation within a species, even within a single locality, suggesting that life history and small-scale environmental factors may interact to result in differences in the isotopic composition of ants.
Baggio advances a provocative set of hypotheses of remarkably broad scope.
