identify duplicate in a range or overlapping with cirteria

hi
I am trying to create a formula which can identify duplicate in a range or overlapping numbers as I continue to enter data below in column C and D.
for example row 6 has value from 1 to 10.215, in row 11 if I enter from 5.25 to 8.63 formula should be able to identify the range and show that this is duplicate based on similar section and side (shown in the excel sheet).
hopefully you can understand the problem better if you look at my excel sheet.
Is that possible?
Thank you in advance for your assistance