Bihliograpldcal Notices. 79 



/"Schlerii Dolomite or Doloiuitic Limestone (including at 

 I the base the Clpit Limestone). 35U metres. 



MiDDr,F, TiuAs. j Cassian Marls. | ^q ^^j-j-gg 



About 510 metres. | Wengen Shales, Tuffs, &c. J 



I Buchenstein Limestones. 20-40 metres. 

 l^Mendola Limestone or Dolomite. 40-60 metres. 



Passage-beds. Crinoid Limestone, Oolites, and Eauoh- 



wackes. 60-90 metres. 

 Upper Werfen Marls and marly Limestone. Naticdla 

 costata zone. 100-160 metres. 

 Lower Trias. Blue shales and marls. 35 metres. 

 About 500 metres, i, Micaceous layers or Rauchwackes. 25 metres. 



(maximum). Lower Werfen. Red and grey marls and shales. Paeiido- 



mo7ioiis Clarai zone. loO metres. 

 Lingula fenuissima zone. 20 metres. 

 Poikilitic marls and limestone. Natica gregaria zone. 

 40 metres. 



r BcUerophon Limestone, gypsum, &c. * 



.. ll'J'^^;. \ Grciden Sandstones, Quartzites, or Breccias. 



About /O metres. | Q^^^^tz-porphyry. 



It is indicated also in this Table : — That the Schlern, Cassiau, and 

 Wengen beds are equivalent to Salomon's " Marmolite Limestone." 

 That the Mendola limestone and the Passage-beds are equivalent to 

 Salomon's "Alpiner Muschelkalk."' That "the Passage-beds are the 

 age-equivalent of the uppermost horizons of the ' Myophoria beds ' or 

 ' Ileichenhall Limestone ' in the North Tyrol and Bavaria-Roth 

 horizon with salt, gypsum, &c." The Upper Werfen is equivalent 

 to llichthofen's " Campil Strata '' and the Lower Werfen to his 

 " Seisser Strata." 



The numerous fossils collected by the Author in the field, except 

 the Wengen-Cassian fossils of Sella Pass (pages 26-28) were almost 

 all from the AVerfen series, and were identified for her by Dr. Broili, 

 of Munich. 



The igneous rocks received great attention from the Author in 

 the field and have been carefully described, from her preparations, 

 by Mr. Gibb, of Aberdeen ; and to indicate the important part 

 played by them in nature and described in this Memoir, we may 

 with advantage quote the following from pages 29-30 : — 



" This paper therefore confirms the conclusion I previously formed when I 

 investigated Euneberg and Buchenstein, viz., that the copious flows of augile- 

 porphyrite, regarded as extrusiye were in reality intrusive, and had been 

 intruded pre-eminently into fault-planes and lines or horizons of weakness and 

 crust-deformation. The previous investigators of Fassa Valley failed to 

 recognise the presence of the innumerable crusli-planes with extremely low 

 hade, and the branch-connection of many of them with leading cross-faults, and 

 consequently overlooked the correlation of the igneous invasions with pre- 

 existent deformational structures. 



" As the presence of igneous rock undergoing consolidation amidst the Triassic 

 succession only served to still farther accentuate and concentrate the differential 

 strains at special horizons of the crust, during the Tertiary movements the same 

 crush-zones were again and again the seat of crush-movements, and were 

 invaded afresh by molten material. In the unmediate vicinity of the larger 

 igneous masses, the sedimentary deposits tended to subside; thus the lucal 



