80 L, Richardson — Sections of Rhcetic Beds. 



shape by various causes before we can examine them : currents 

 may deflect the deposits from where we should expect them : and 

 not all the contours of the sea-bottom are caused by deposits alone. 

 All that can be said is that the tendency of uniform deposits ta 

 thicken before ceasing must always be present, and must modify 

 any result which may be due in part to other causes : while under 

 some circumstances this cause may be expected to be the only one 

 which gives the deposit its form. 



VII. — On two Sections of the Kh^tic Rocks in Worcestershire, 

 By L. EicHARDSON, F.G.S. 



A DESCRIPTION of two Rheetic sections forms the subject of 

 this communication. In a county where but one section has 

 been described this is a considerable addition to our knowledge 

 of the series. It is remarkable that the section at Crowle has not 

 been previously noticed ; it may be easily examined, and not like 

 the only recorded section in the railway-cutting at Dunhampstead, 

 which is necessarily difficult to obtain access to. The Crowle section 

 is situated at the junction of the road from Oddingley with that 

 from the house marked as " Frisland " on the Geological Survey map. 

 The beds are affected by a fault having a downthrow of about 14 feet. 



Section at Crowle, near Worcester. 



/ 7. Shales, black. 

 8. Sandstone, yellowish -white. 



ft. ins. 



? o 



O a. 

 o 

 N 



9. Shales, brown, imperfectly laminated ; uppermost 4 ins. black 1 2 



10. Sandstone, several layers separated by shaly partings ; Gyro- 

 lepis Alberti, teeth of some actinopterygian fish (possibly 

 Gyrolepis), annelid-tracks, ripple-marks, and a vertebra 9 



11. Shales, black; nmnerous sandstone layers, uppermost 3 ins. 

 brown 1 8 



12. Sandstone (Bone-bed-equivalent), yellowish-white, micaceous, 

 ^^( fissile; Schizodus (casts), ripple-marks, and annelid- 

 tracks ... ... ... ... ... ... ... 1 1 



13. Shales, black (weather grey), laminated, arenaceous towards 

 base 2 11 



(a. Sandstone, yellowish -white, micaceous, fissile ; casts of 

 Schizodus somewhat abundant — especially in the 

 lowest layer ... ... ... ... ... ... 6-8 

 b. Sandstone layers with shaly partings 2-3^ 

 c. Yellow clayey deposit 1 



^ § ( I. 'Tea-gi'een Marls.' Creamy white and slightly green marls 

 gj ^ < with three harder bands of marlstone : estimated at ... 31 



tJ B I II. Bed marls with bluish zones and blotches. 



The 'Tea-green Marls' are well exposed, and comprise creamy 

 white marls, slightly green in places, with harder bands, the 

 marlstone composing these harder bands having a most irregular 

 fracture. At the base of the Rhsetic is a yellow clayey deposit in 

 which no organic remains were observed. The junction of the 

 Rhsetic and Keuper series is sharply defined, as is also the case 

 in North-West Gloucestershire. About 3 inches of thin sandstone 

 layers with intercalations of shaly matter separate this yellow 



