They believed in the Bible and Creation.
It’s impossible to say whether if they continued to live to today, whether they would accept the current Scientific hypotheses about the age of the earth as fact or not.
The fact is, their belief in creation did not stop them from being excellent scientists. The two are not incompatible.
Rejecting current science’s interpretation of observations and extrapolations and assumptions regarding the age of the earth doesn’t make someone anti-science.
That’s just evolutionist’s labeling to try to win an argument by default. The fact is that none of us were there, nobody can say with certainly except for God how the earth was created and how long it took.
Jesus’ first recorded miracle in the New Testament was to create wine, something that has the appearance of age. Science doesn’t know how Jesus died it. And they don’t know how God created the earth either. They have some interesting observations and hypotheses.
If there is a scientific basis for rejecting a scientific theory, that is no problem. The Bible, however, is not a scientific basis. What’s more you cannot claim that it is God’s Word by citing the Bible itself for this authority. Anyone could write a book claiming to be the word of God(many have)and there is no way to prove empirically the their book is not the word of God.
For myself, I don’t think there is an issue reconciling science and faith. When I hear about the vastness of the Universe or the sub-atomic world, I am awestruck at the power of God.