Thursday 20 August 2009

Fossiliferous

Could describe the areas current population, being as it's full of elderly and very elderly retirees! Not only that but Crumbling Cliff is now one of them! However, speaking literally rather than metaphorically, and geologically to boot, a little bit of crumble didn't harm anyone. This process reveals a wealth of ancient animal life along a relatively short stretch of the south coast. The soft "rocks" around here, across to the Isle of Wight and back to Selsey range from approximately 54.0 to 23.0 million years in age and represent some of the best examples of Eocene and Oligocene deposits in Britain. Fossils abound in the Barton Beds which contain good specimens of bivalves and gatropods (see below example of Turritella sp. from the Upper Eocene 40.0-36.0 million years ago).


A short, if expensive, ferry ride across to Hamstead Bay on the Isle of Wight brings you forward a few million years (rather than back a million years or so - as some may say after having been to the Isle of Wight in February!) to the Oligocene and along the beach are revealed small pieces of turtle shell.

Taking a trip further along the coast to the east, the western side of the Selsey peninsula at Bracklesham is excellent for finding shark's teeth. These deposits are quite a bit older at 50.0-40.0 million years.Careful where you tread!

Monday 17 August 2009

On the verge of excellence

I don't know if the grass verges around the lanes and avenues where we live are unusual in any way, but they do seem to be very rich in meadow plant species. I've been looking at them for a year or so now and my list of species present is growing. Despite the regular cutting by local house owners and the frequent management by the local authority there's a lovely show of wild flowers through the year.
The verges are the last remaining bits of the meadows present in the area before the housing development here in the early 1960s and, as far as I can tell, were pasture land as opposed to arable. The soil pH is just on the acidic side of neutral, to be expected on New Forest gravels, clays and sand and the vegetation reflects this with some anomalies.


As a taster, here's some of the more unusual species (for urban verges) found so far: lady's smock, bugle, chamomile, heath and lady's bedstraw and autumn lady's tresses (see above).