nl.AF HOLTKDAHI.. [SEC. ARCT. EXP. FRAM 



other siinilar structure- have been called Cri/ptozoon by American geo- 

 logists, ami which arc extremely common in Hie dolomites and limestones 

 ,,f ili.' rp|"'i' Cambrian and Lower Beekmantown in Ilie Appalachian 

 Y.ullev. a- well a- in New York. 1 will not here go into Ihe question 

 of tin- nalniv of tin- >tructure. as the matter will, in the near future, he 

 treali-d by Ihe present author in a paper dealing with the geology of 

 Kinmarken in Norlhern Norway, where similar structures in dolomites 

 are very cummin. The >tructures called Criifrfozoon in America are of 

 rather different lyp' 1 -. a> some .-how lamina 1 throughout the rork. as in 

 tile -pecimen from I lavnef jord. while others show more isolated, single 

 ..-penmen-" with -Irnclureless rock in intervals between the coiicen- 

 Irically built convex elevations. The Cri/ptozouH )>n>l i/'mi ni H.M.i.froin the 

 KIIOX dolomite, illustrated by STOSI-: in his (taper on Tlle Sedimentary 

 rocks of South Mountain, Pennsylvania" 1 p. '2\1. tig. .'). is remarkably 

 -imilar to the specimen from Ellesmereland. Au interesting feature in 

 the latter is the existence of oolitic structure in some places, between 

 the lamina 1 , a feature also known from localities in Pennsylvania. 



In Ibis connection also the presence of very considerable quantities 

 of limestone-conglomerates, certainly in t informational, in the basal 

 portion of the Ellesmereland sedimentary series, is of considerable mteiol. 

 since similar conglomerates are predominant rocks in the I'pper (iamhrian 

 series of the Appalachian Valley (Conococheaque) as well as in the P.e.-k- 

 mantown, 



The petrographical likeness between the basal paleozoic sedimentary 

 series of Ellesmereland and the Ozarkian deposits of the Appalachian 

 Valley strongly indicates an open oceanic connection between the two 

 regions at Ihe time in question. The straligraphic conditions in the far 

 north also seern to be very similar to what is known from the Saratoga 

 di-lricl in New York, where, resting on the Pre-Camhrian we find a not 

 thick >ainl-lone hed on which lie CryplozOOn-be8.ring limestones and 

 dolomites of Upper Cumbrian age. - 



The f;ic| (hat J'lll km. to the south of Kllesmereland. on Ihe south 

 -nle of North hevon. Silurian (Xiagaranl limestone is found only some 

 ten- of meters above the Pre-Cambrian, probably means that dry land 

 '\i-lrd there in CambfO-Ordovician time, although it cannot be considered 

 impossible that >edimeuU corresponding to a pail of that time have been 



deposited but later on removed bv ero>i()ll. 



.lunrnal .,f ( ,,-,,!,,- y, | 1, I'.IMC, 



> (liNiiiNo ami l'ci. i.i M \N\ . ( Irolnijy of S.n-.ilc^a s|irin^'s and Vicinity" in 

 Kiill.-liii 1C, 1 .). N.-w V,,rk St;il.- Mii-riiiii, I'.) 1 4. 



