Assertion: soft shell clam's shell | /r/HasProperty | thick
Facets:
Source sentences:
text: The dingy white shell, which is thick and rounded and has prominent concentric lines, is found in the intertidal zone from the Gulf of St. Lawrence to the Gulf of Mexico; it is the most important food clam of the Atlantic coast.
text: The shell is broadly ovate, thick, and sharply pointed except when eroded.
text: It is obvious that the entire mantle takes part in the formation of the shell, but the margin is by far the most active; if this were not so the resulting shell would be as thick as wide.
text: The shell is thick and firm, oval in outline and roughened on the outer surface by numerous concentric growth lines; within, it is white with slight touches of purple, particularly about the siphonate end.