Pholad borings are tubular burrows in firm clay and soft rock that have been created by bivalve molluscs in the family Pholadidae.

What is meant by Philadelphia?

a city and port in SE Pennsylvania, at the confluence of the Delaware and Schuylkill Rivers: the fourth largest city in the US; founded by Quakers in 1682; cultural and financial centre of the American colonies and the federal capital (1790–1800); scene of the Continental Congresses (1774–83) and the signing of the ...

What is Pogonology the study of?

: the study of or a treatise on beards.