162 Essex Well-Sections.
Rettenden.—Battle Bridge. Mr. W. Clarke's, about half
a mile from the River Crouch. 1884.
Probably about 80 feet above high-water mark.
Sunk and communicated by Messrs. Legrand & Sutcliff.
Bored throughout. Water-level 641/2 feet down.
It is possible that the green sand may be merely the wet
sandy basement-bed of the London Clay. Even if not so the
depth to the bottom of the London Clay would be 414 feet,
which shows a great thickness of that formation, the top part
of which is not here present.
Roydon Hamlet.—Old House Farm, near Brickworks.
Sunk and communicated by Mr. G. Ingold.
Dug throughout. Strong spring from the gravel.
Sheering.—Coffee Tavern.
Sunk and communicated by Mr. Gr. Ingold.
Shaft. Water rose 14 feet from the bottom.
White and blue Boulder Clay 43 feet.
Shelley (near Ongar).—Cottages near the Red Cow Inn.
'Chelmsford Chronicle,' March 22, 1878.
Dark marl, bedded with much small chalk and shells, about 30 feet.
Hard rock of cemented gravel.
Fine mud, bored through a short distance to water [? London Clay].