I have enlarged the Geological Survey Map, and marked the area (dirty yellow) a little better to see where the superficial (top layer) deposits are described as Head- Clay, silt, sand and gravel, deposits formed up to 3 million years ago. I have marked some of the roads to get the bearings.
Searching for “Head” in geological terms comes up with... Head essentially comprises sand and gravel, locally with lenses of silt, clay or peat and organic material.
There is another area over towards Wylde Green that also comprises of Head and follows Plants Brook. However most of the deposits of the surrounding area, pink on the map, are described as Glaciofluval deposits (in this case sand and gravel) from the Devensian.
Again looking in geological terms Glaciofluval comes up with... relating to or coming from streams deriving much, or all of their water, from the melting of a glacier....Devensian is name used by British geologists for the last ice age.
So on the face of it, a chap in Lakeside Road can dig in his garden and turn up deposits laid down 3 million years ago. And the chap in Court Lane can only turn over deposits from the last ice age being about 12,000 years.
This is all very interesting but is it relevant? Well, it seems extraordinary that right at the top end of this area of “Head” is the modern Lakeside Road at the site of what was Lake House. There is the ancient map that shows Baldmoor Lake on both sides of the Chester Road, as does the area of “Head” on the Geological Map.
From the advert of 1826 there is an inclosure for the Coldfield of “a portion of valuable land called Baldmore Lake” and later from adverts of 1838 there is the Sale of Freehold building land... “the whole of the two Baldmoor Lake Pieces, immediately joining (Oscott Estate)...the whole of the frontage to Court Lane, embracing a depth of 80 yards, will be laid out in lots for building...in that rapidly increasing neighbourhood....(a further advert says) the land fronting Court Lane will be offered in 15 lots having a frontage to Court Lane of 10 yards and each 30 yards in depth. The two corner lots, which are larger, are either of them well adapted for the site of a good Inn with roomy stabling, or a general Shopkeeper’s establishment, which are much wanted there.”
It looks like the Baldmoor Pieces were on the eastern side of Court Lane, as by the 1880s the western side still belongs to the College, and Lake House now exists. (See Thumbnail). So there seems to be enough references to the “Lake” to suggest that there was once a Lake?