The phrase "ages overlap" is correct and usable in written English.
It can be used to describe a situation where two or more age ranges share common years or periods.
Example: "In this study, we found that the ages overlap significantly, indicating that many participants fall into both categories."
Alternatives: "age ranges intersect" or "age groups coincide".
Swifterbant pottery food crusts from a Belgian site were on average 320 ±159 14C years older than plant material, and only three food crust ages overlapped with the age range of terrestrial plants [15].
Simultaneous measurement of age standards, namely Durango apatite and Fish Canyon Tuff zircon, yielded reasonable ages overlapping with the reference ages within ±1σ (Tables 2 and 3), indicating accuracy of the dating results.
Alternatively, this finding may hint that lead-induced cognitive impairments in older age overlap with those of AD.
Finally, it should be recognized that the time scales used for events that occur in utero (viz., gestational age) and events that occur in infancy (viz., age) overlap because they have different anchors (last menstrual period and birth, respectively).
As a New Yorker whose teen-age years overlapped with that period, and who spent many weekends at the Danceteria on Twenty-first Street, I may be biased in favor of that view.
Moreover, if as suggested [26], the molecular clock did not apply to the entire coding region, but only to the synonymous mutations in the 13 genes coding for protein subunits, it would be rather unlikely that an age overlapping such as that reported for the well represented founder haplogroups (A2, B2, D1, C1b, and C1c) in Table 1 would be observed.
They were selected with gender distribution and mean age overlapped with patients (mean age 43.9 ± 12.6 years; 22 were females).
It is noteworthy that the Chr 1 locus linked to hypertriglyceridemia at 8 weeks of age overlapped the Chr 1 hypercholesterolemia QTL.
