The phrase "a overlying" is not correct in written English.
The correct form would be "an overlying" since "overlying" begins with a vowel sound.
Example: "The geologist studied the layers of rock, noting the an overlying sediment that indicated a shift in the environment."
Alternatives: "a covering" or "an overlaying".
Possible mechanisms for the vapor release are sublimation from about 0.6 km2 of exposed surface ice, or cryovolcanic eruptions resulting from radiogenic internal heat or from pressurization of a subsurface ocean due to growth of an overlying layer of ice.
For each BCS procedure, an overlying skin ellipse was incised with a #10 surgical blade.
Vulnerable plaques are generally characterized by a lipid and vascular rich plaque with an overlying thin fibrous cap, containing numerous inflammatory macrophages and VSMCs.
The first three-man crew deployed an improvised "parasol" sunshade (later fortified with an overlying sun shield) to prevent serious overheating of the station during their 28-day mission and released the jammed solar array.
Frozen embryos were removed with forceps (at liquid nitrogen temperature) and placed in a scintillation vial containing Molecular Sieve beads and frozen 100% ethanol with an overlying layer of liquid nitrogen.
Albeluvisols are characterized by a subsurface layer of brownish clay into which "tongues" of bleached material project from an overlying layer extensively leached of clay and iron oxides.
It was fortified with an overlying sun shield to prevent serious overheating of the station during the second crew's 59-day mission.
Charred stone tools in the same soil layer and sand grains in an overlying dune establish the artifacts' date.
In contrast, I measured Aβ1 42 that diffused from the brain into an overlying layer of agarose in vivo.
Xylan forms an overlying layer through hydrogen bonding with the cellulose, while it is covalently linked with lignin, which forms an outer sheath to protect the plant [ 9].
