NJDEP - NJGS - First Annual Report of the Geological Survey of the ...

64. -Colt's NeCk, and indeed entirely across the State, lies 'betweenthe first and second beds of marl• , .... i . ....'• _':A bed much resembling beach .sand, witll a very fewmarlgrains scattered through it, lies between tt!c second a_l thirdmarl beds. t• :The several beds of marl are each made up of distinct layers,which vary in appearance and in properties. ' . _,In the first bed five distinet layers may be recognised. :• 1. A layer of sand and fine gravel, from; two to four ormore feet in thickness. This is very distlnetly sepurp.ted frbmthe clay which lies immediately under it. It contains numejrousfossils, a considerable proportigu of marl grainsj and i8valuable as a manure. It is known as' sand marl. ' , . ,• 2. A layer, of nearly pure marl grains_ of variable .thick:hess, averaging perhaps four feet.. A little blackis h clay ismixed with the marl, from which it is generally known as$lack:_arl. It contains but few, fossils. As a manure it ishighly prized. Though always found, it is, not .very. disrtinctIy separated from the next layer. _ • :,• 8..A_ layer of from twelve to sixteeu feet in:thickness,known as/,lue or g_y marl, from its containing a considerableamount of a drab colored clays inclining to bluish or grayish_It has numbers of very large and heavy oyster shells in it-_generally there is a streak from eight inches to two feet thick,which:is almost solid with _bells. "This layer is very highlyprized as a quick and lasting.fertilizer. It changes graduallyinto the one next above. . _ .4. Three or:four feet of black _arl, almost exactly likothat of No. 2. It is not found distinedy'marked in all p]aees,5. Dark colored marl six or eight feet thick, containingfewer and fewer of the marl grains in its higher parts, and atlast only to be dlstinguished,from the dark elay!iutp which itruns, by the thin flaky shells scattered through it. '. :".. ',.• The thickness of this bed of marl is at lea_t thirty feet.The whole can be seen m the side of the lq'evi_ink. Hills. onthe shore of Sandy Hook Bay. They have all_been passedthrough in the pits of'the North .American ;Phalanx, and. Mr.NEW JERSEY GEOLOGICAL SURVEY