RECENT ADVANCES IN SCIENCE 115 



older and newer granites, great quartz-dolerite sills similar to 

 those of Tasmania, and the Kainozoic lavas and tuffs of Erebus 

 and other centres. 



In a paper on the Annan Red Sandstone Series of Dumfries- 

 shire {Trans. Geol. Soc. Glasgow, 191 6, 15, Part III. 374), Prof. 

 J. W. Gregory and Dr. J. Home indicate the succession and 

 lithological differences of two sets of sandstones. The Annan 

 Series, an aqueous deposit, is probably of Bunter age ; the 

 Dumfries sandstone, an unmistakeable desert formation, is 

 correlated with the Penrith Sandstone as Permian, a con- 

 clusion supported by the evidence of the fossil reptilian foot- 

 prints. 



The intricate Carboniferous stratigraphy of the Midland 

 Valley of Scotland is further elucidated by P. Macnair, in a 

 paper on " The Hurlet Sequence in North Lanarkshire " (ibid. 



387). 



W. N. Benson has continued his studies on the geology and 

 petrology of the Great Serpentine Belt of New South Wales by 

 the publication of a paper on the geology of the Tamworth 

 district (Proc. Linn. Soc. N.S.W. 191 5, 40, 540). There is a 

 fine development of Devonian rocks in this area, including the 

 radiolarian group made classic by Prof. T. W. E. David, and a 

 great series of pillow-lavas and associated intrusions. 



Glacial Geology. — In a paper on the age of Loch Long, the 

 most typical fiord in south-western Scotland, and on its re- 

 lation to the valley system of southern Scotland (Trans. Geol. 

 Soc. Glasgow, 1 916, 15, 297) Prof. J. W. Gregory concludes 

 that the basin of Loch Long was in existence before the Glacial 

 Period, and that it has been deepened by glacial excavation 

 only to a very slight extent. 



From further observation of the " Arctic beds " at Ponder 's 

 End, S. H. Warren concludes (Quart. Journ. Geol. Soc. 191 6, 

 71, 164) that they form an integral part of the Low Terrace 

 River-drift, and are not isolated patches of some earlier deposit. 



The late A. M. Peach describes a very perfect pre-glacial 

 platform which forms a coastal shelf around the mountainous 

 island of Prince Charles Foreland, Spitzbergen (Trans. Edinburgh 

 Geol. Soc, 1 91 6, 10, 289). This platform terminates inland at 

 a height of 1 50 ft. above sea level, and is backed by lofty cliffs 

 or precipitous slopes, which indicate origin by marine erosion. 

 The platform also occurs along the walls of the fiord system 



