Assertion: carapace's layer | /r/Causes | a stacking effect
Facets:
Source sentences:
text: If a tortoise is dehydrated or unable to access conditions which are sufficiently moist, the keratinous layers which would otherwise form at the edges of scutes grow beneath the exisiting hardened shell causing a stacking effect which pushes shell growth upwards rather than outwards and exerts pressure on the skeleton beneath the shell.