U. Silurian and Old Red in S. Stajfordshire. 441 



(14 feet) are Uppei' Ludlow yellowish-green mudstones (D) with 

 many Chonetes striatella. This leaves 26 feet for A, B, and C. 



The sequence at the first quarry north of Sedgiey Church, which 

 we have compared with the Beacon Hill Quarry, is thus : — 



ft. in. 



A. Aymestry massive limestone with Conchidium Knightii . .6 6- 

 Nodular limestones with thin blue partings. Atrypa retic^ilaris, 



B. nuciila (very common), B. Wilsoni, Pentameriis galeatus, 

 Conchidium Knightii (1 foot above massive limestone), 

 Strophomena rhomboidalis, 0. canaliculata, Chonetes stria- 

 tella and minima (rare) . . . . . . .50 



B, C. Limestones with thin blue partings. B. nucula and Wilsoni 



(very common), 0. canaliculata and lunata, Orbiculoidea 

 rugata, Dayia navicula {coTainon), Serjnilites longissimus . 4 6 



Limestones with some blue partings at base and thick brown 

 partings higher up. Bhynchonella nucula (very common), 

 0. canaliculata, lunata, and elegantiila, Chonetes striatella, 

 Orbiculoidea rugata, Dayia nctvicula, Cardiola interrupta, 

 Orthonata amygdalina . . . . . . .46 



Limestones and brown calcareous sandstones. B. nucula, 

 Chonetes striatella and minima (all common), 0. canaliculata, 

 lunata, a,nd elegantula, B. Wilsoni, Lingula lata, Cyclonema 

 coralii ........... 5 6 



D. Calcareous yellowish-green sandstones with thin 2-3 in. limestone 

 bands. B. nucula, Chonetes striatella and minima (all 

 abundant), B. Wilsoni, etc. . . . . . .90 



35 



In alt the Sedgley quarries where the massive limestone pccurs we 

 find, if the section continues upwards for 25 feet, that Chonetes 

 striatella and minima abound and L. lata occurs. The Aymestry and 

 Upper Ludlow strata below this Chonetes zone, both at the Lye and 

 at Sedgley, are lithologically similar, and are in thickness always 

 under 30 feet. 



Though the Ludlow Bone-bed cannot so far be found at Sedgley, 

 yet we detected it 1 mile to the S.S.AV. at Turner's Hill in an 

 overgrown quarry at the top of the hill and in the adjacent footpath. 

 Alurchison recorded limestones and dirty yellowish sandstones of 

 Ludlow age here.^ The lowest bed in this upper quarry is a 

 peculiar reddish-brown sandstone (D^) with R. nucula and Chonetes 

 minima that at Saltwells is within 5-^ feet of the bone-bed. Above 

 this are hard quartzitic and fine yellow sandstones. The fine yellow 

 sandstones are similar to the less calcareous parts of the rocks which 

 at Saltwells are interstratified in the two bone-beds' impure lime- 

 stones, and at Lye occur just above and below the Ludlow 

 Bone-bed. Both these sandstones contain many L. Zez<^/s?V (medium 

 species) and the yellow sandstones Onchus and R. nucula and black 

 markings in abundance. They are succeeded by coarser yellow sand- 

 stones, like E^ at Lye, with L. Leivisii. Coal-measure clays overlie 

 the latter. We have found in the quarry at the bottom of the 

 hill lStrophome7ia euglypha, rhomhoidalis, ornatella, Atrypa reticularis, 

 etc., and identify the rocks exposed there as belonging to Zone A, 



^ Silurian System, 1839, p. 482. 



