After a record-breaking late summer bank holiday with temperatures of 28C in Leeds, we had a downpour yesterday evening. The paving sand that I’d swept into the cracks a couple of days ago has been washed out in places by the overspill from our driveway. The dished concrete channel in front of the garage door can’t cope with the run-off from a rainstorm.
It’s been a good test for a small area. I’ll buy a small bag of cement and make a dry mix – three of sand to one of cement – with the remaining sand to brush into the crevices on the sloping driveway.
Wadi Rum
The swirling shapes of my little patches of washed-out sand remind me of the run-off deposits that are left by flash floods in wadis, as in this Google Earth image from the Wadi Rum Protected Area, Jordan.
Yesterday, after taking out a few weeds, I swept sand into the cracks between the paving slabs by the front door. Already this morning, there are signs of activity. Could these be tracks left by an insect? Or a woodlouse?
Something has been active in the corner. I didn’t notice this tiny snail shell until I spotted in the photograph. It might have been dislodged from a crevice yesterday but I suspect that it’s been introduced along with the sand.
The sand is from Denmark. The grains are small, mostly less than a millimetre, and well-rounded, so perhaps this is windblown sand from a former dune system. Denmark has extensive dunes along its western, North Sea, coast and, further inland, extensive areas of glacial sand and gravel.
In my photograph, the glassy grains are quartz and I think that the larger, fleshy-looking ochre fragments are feldspar.
Danish sand: Dansand No Grow Block Paving Sand
Doorstep Bio-blitz
Garden snail
The seven species that I disturbed as I weeded around the paving stones yesterday come from seven different families, four classes and three phyla, so, within inches of our front door, we have an annelid worm, a gastropod mollusc, an isopod crustacean and a social insect.
I disturbed a large ant as I swept the driveway, which I guessed was a queen. The queen disposes of her wings after her nuptial flight, then sets about finding a suitable site – such as here under the paving stones – to start her colony.
Coincidentally, later, a few yards away, I spotted a worker ant carrying a single transparent wing, which looked like one that had been discarded by a queen.
