Page:Report of the Second Norwegian Arctic Expedition in the "Fram," 1898-1902 (volume 4).djvu/477

 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. 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>ill. .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.