Webster's Revised Unabridged Dictionary · 1913

Shelfy

Shelfy , adjective

1.
Abounding in shelves; full of dangerous shallows.
A shelfy coast. — Dryden
2.
Full of strata of rock. [Obsolete]
The tillable fields are in some places... so shelfy that the corn hath much ado to fasten its root. — Carew