o /I o 



\\ 



liicli (\\(> ;ii'(> (»r r('lsil(>-|M»r[tlivrv. Aii alxnil (m|ii;i1 (|ii;iiitil\ ofsharp 

 saiid, iiii.\(>(l willi (•Ia\ , laken al llic Uasis, 4o.55 M. '. A. W deep, 

 j)ri)(lii('(Mi l(Mi pt^ltltles of llir saiiic Scandinaxia)! liiiiesloiie species, 

 llie l)i,ü,iiesl liaxiiiu' 12 niM. iiiaxiiiial diiiiciisioii, besides 15 pieces of" 

 various enipli\e rocks, ainoiiust wliicli Iwo of coiupacl porpliyfy. 

 Kor tlie i'est the specimens coiilaiii oidy a few red and lifev (ptart- 

 zites and an odd llinl-nodnle; llie ly|tical iJhinisli roidvs are at any 

 i'ate l)y far in tlie niiiKjrity. No donhl tins clay of tlie northern 

 extremity of tlie prise d'eau of the IlarkMu w.itei-works isahonlder- 

 (day of Scan<iinavian ori,ü:in, tiie l)o1l()ni-nioi'aine of an ice-siieej 

 precedijif» the deposition of Eeni-I)e(k whicli is considered to be the 

 younge^^t stratum of the Diluvium in our country ; so the basis of the 

 mentioned bed with sea-shells, indeed corresponds with the ejid of 

 the last advance of the norlhei'n ice. In a recent, nnudi kirncr boring-, 

 in (dose proxinuty ofliiejust mentioned one, tlie uppermost occurrence 

 of Scandinavian stones, measurin.U' 4 c.M. ad nia riiiiinn^ si(k' b\- side 

 \\ilh a larue majority of stones of Rhinish ori,i>'in, is found to be al 

 '<V1 Al. ; A. P. 'Jdie boriiiii' did Jiol uo (kn^p enouuli to reach ike 

 boukk'r-(day bed, but at 33.5 iA.P. it met witli a thin kiyer of bk-ud< 

 k)ani, conlaininu' some remains of IVeskwater-planls. Tke basis of the 

 PleisloceJie shell-bed (dearly is al o2 M. .' A. P. 



At Harlem Lorik found tliat basis at 35.6 M. ' A. P. and 

 1 fouiul it at a similar deptli m\s(df, in a nund)er of borings 

 done at Harlem, of which Mr. Stoel had kept the specimens. At 

 Velsen, shells characteristic for the Kem-bed are found down to 

 36 M. : A.P.; at (Wricnm to 31.5 AL, at Pitgeest to 31 M.: at 

 Purmerend to 32 M.; al Alkmaar to 34 Al.; (a sinular figure is given 

 by LoRiÉ), at \'()geleJizang (according to Lorie) to 3().<^ Al. ; in the 

 dimes beiween Katwijk ajid Sche\ eningen, in borings for the Ijcyden and 

 llie Hague waterworks, ike skells were found, down to 28 Al. r A. P. ; 

 and at Alonstei', in borings for tke Delft waterworks, down to at least 

 30 Al. : A. P. 



xV lillle kigker, al about 30 Al. \ A. J', average deptk, or a few 

 meters less deep, lies in ike wcslern (duef part of Xoi-lli- and Soiitk- 

 llolland, Ike upper side of a /.one of coarse-urained, often gi'avellv 

 sand, even of real tijie graxck wkick often coiuains bigiiXM' or 

 smaller stones. It corresponds wilk a last increase of ike geological 

 transport in tke Pleistocene. \\ kick was connected wilk a lasl period 

 of glacialion. k'ourleeii years aiio. ils e.xisleiice was ikougkt not 

 allogelker impossible by I )r. PoiUK. llion^k, (coiisideiMng I lie know ledge 

 we llieii liad <d' llic hiiiek soi|i, lie did nol xciiliire to draw a 



23 

 Proceedings Royal Acad. Amölerdaiu. Vul. VI. 



