Current Action in t/ie Ordovician. — Enedenutnu. 371 
Three layers with mud-tiovv structure and rhabdosomes of iJiph)- 
(fvaptuH. Bearing, N. 75 degrees E. Apices or sicular ends point east. 
Two layers with Diplotjrapius pristin. Bearing, N. 70 degrees E. 
Layer with mud flow and Endoceras. Bearing, N. 77 E. Nine En- 
duceras shells point east, none west. 
Two layers vvitli Eiidocenis, all point N. 60 E. Behind the apertures 
of the shells are piled up smaller shells of Endoceras, gasteropods and 
brachiopods. 
Layer full of shells of Endoceras, all exactly parallel in N. G3 degrees 
E. direction, the apices being east. The shells are arranged in rows and 
connected with long mud ridges extending from the shells towards the 
southwest. 
Layer with Endoceras shells, 2 S. W., i in differing directions. 
Layer with rhabdosomes of Diplograptas; no direction. 
Layer with spicules of sponges, Endoceras and small l)racliioxjod 
shells, (the latter with their beaks toward east). Bearing, N. 05 70 de- 
grees E. 6 Eadorrras shells pointing east, none west. 
Calcareous bank. 
12. Ssven feet of shale, containing: Layer with Dlplograptiis, Endo- 
ceras and spicules. Bearing, N. 76 degrees E. Ten shells of Endoceras 
point east, one west. Apices of graptolites point east. 
Seven layers striated by parallel spicules: besides numerous grapto- 
lites and some shells of Endoceras. Bearing, N. 65-70 degrees E. Shells 
of Endoceras point east. 
Layer with spicules and Endoceras, the latter lying N. 30 degrees E, 
and 6 pointing west, 1 east. The sponge spicules, however, show in 
some places the same direction, in another place their bearing is N. GO 
to 70 E., and in other places they lie in all directions. There was, there- 
fore, apparently no general equal motion of the water or the flow was so 
slow that it had no constant directing influence. 
Two layers with E ndoce ras (a sxnuW surface only exposed). Bearing, 
N. 70-80 degrees E. 8 point east, 2 west. 
Layf^- with Endoceras. Thirteen specimens arranged in N. .50 80 de- 
grees E. directi<jn, 1 others under right angles to these directions. The 
apices of 12 of the former specimens arc directed toward west. .\s the 
4 specimens with varying directions show, there was no constant direct- 
ing, or a very weak directing force. 
Liayer with Endocei'as. Bearing. N. 80 degrees E. Seven directed 
eastward, none westward. 
Three layers of Endoceras. Bearing N. 80 degrees E. Two point 
west, six east. 
The average of the bearings observed in this whole section 
which comprises some twenty-four feet of shale, is N. 08 de- 
grees E.. or a direction falling near E. N. E. 
Continuous with this exposure is another one in the over- 
lying rock. A few layers of the latter are exposed over a 
large surface and show distinctly the parallel direction of the 
