Question: Where was the lake in which Margaret Hogg body was preserved located? 
Sentence (from "Beecher's Trilobite Bed"): Beecher's Trilobite Bed is a Konservat-Lagerstätte of Late Ordovician (Caradoc) age located within the Frankfort Shale in Cleveland's Glen, Oneida County, New York, USA.
Relevant evidence: No