'my bedrock' is correct and usable in written English.
This phrase is used to indicate something that is fundamental or essential—the basis upon which someone relies and builds upon. For example, "My education is my bedrock; it has enabled me to pursue a successful career."
I still write poetry once in a while, and the collaborations and commissions always bring something with them, but the novels are my bedrock.
As a writer and a person my bedrock is perennial hope for a better world than this one, and for that I've borne the radical brand, not by choice.
But more likely it was because I never left my classical roots behind because - much as I liked to experiment - I knew that my bedrock as a solo cellist would always be based on that five-hundred-year treasure trove called classical music.
It was, for better or worse, my foundational bedrock schooling, not in belief -- I was raised Protestant -- but I went to Catholic school for 12 years.
My family is truly the bedrock of my life.
"My wife, Cathy, has been the key figure throughout my career, providing a bedrock of both stability and encouragement.
It is my home base, a place I can navigate via muscle memory, and the bedrock of my artistic formation.
I think his books, more than anything else, form the bedrock of my sense of humour.
Magazines are the bedrock of my career and it saddens me to see the market shrinking so much".
In his Philosophical Investigations, Wittgenstein used a different metaphor: "If I have exhausted the justifications I have reached bedrock, and my spade is turned.
A couple of months ago, his brother Romeo followed suit, and because an unglimpsed child model forms the bedrock of my novel, this has maybe given it a bit of unexpected oomph.
