A general view of the site shows the effect of the dry weather on the plants. Noticeably the Bracken was still green. Although we went there for botany, the disused quarry at Greenleighton is an SSSI site for Geology. It exhibits an exposure of the Great Limestone and overlying sediments of Namurian age (330 mya). The Namurian is a subdivision of the Carboniferous Period. The limestone is 15 metres thick in places consisting of large posts and shaly beds between, a section is seen below.
The limestone floor is calcareous with normally wet flushes. Adder’s-tongue fern (Ophioglossum vulgatum), although yellowing was distinctive and occurred in two areas.
Red Bartsia (Odontites vernus) looking very stressed but coming into flower.
Many of the wet areas had dried out but this Shoreweed (Litterella uniflora) was identifiable sprouting through the mud.
The delicate white flowers of the Knotted Pearlwort (Sagina nodosa) looked exquisite.
In a wetter patch the Harebell (Campanula rotundifolia) made a striking splash of blue.
We found a few spikes of Autumn Gentian (Gentianella amarella) a biennial plant, this one was just coming into flower.
There were many other plants but I was not familiar with this Yellow Sedge (Carex demissa) smaller than the taller growing glaucous and common sedges.
Unfortunately we came across a young Ash (Fraxinus excelior) showing clear signs of ash dieback disease, in the diamond shaped lesions on the stem. First confirmed in Britain in 2012, Chalara or ash dieback is a disease of ash trees caused by a fungus called Hymenoscyphus fraxineus.
Comb Moss (Ctenidium molluscum), looking very dry, is a typical moss of calcareous habitats.
A loose rock composed of a fossil colonial coral.
The shell fragment below looks like Pleuropugnoides greenleightonensis one of the marine shell fossils the site is noted for.
The soft shales above the Great Limestone contained fossil Brachiopods as in the photo below. We did not find the other famous fossil, Cravenoceras leion, mentioned in the SSSI citation.
The fossil rock provided a resting place for this colourful Meadow Grasshopper.
As we were leaving this bird pellet was found. It could be from a Little Owl since it is rich in insect remains.
References: SSSI citation