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Rhode Island Pudding Stone EarthCache

Hidden : 12/27/2012
Difficulty:
3 out of 5
Terrain:
2 out of 5

Size: Size:   not chosen (not chosen)

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Geocache Description:


We were in Boston about a month ago and we did an Earthcache at the New Old South Church called Plums in the Pudding II: Back Bay.
I really enjoyed looking at the church and their use of the Pudding Stone.

A few weeks ago we were hiking this trail in Rhode Island and found some very cool samples of Pudding Stone and decided to create an Earthcache for others to see and enjoy.

A map of the WEETAMOO WOODS & PARDON GRAY PRESERVE can be found here.

Puddingstone, also known as either Pudding stone or Plum-pudding stone, is a popular name applied to a conglomerate that consists of distinctly rounded pebbles whose colors contrast sharply with the color of the finer-grained, often sandy, matrix or cement surrounding them. The rounded pebbles and the sharp contrast in color gives this type of conglomerate the appearance of a raisin or Christmas pudding.
There are different types of puddingstone, with different makeup and geographical distribution. These include:

  • Hertfordshire puddingstone, is a conglomerate sedimentary rock composed of rounded flint pebbles cemented together by a younger matrix of silica quartz. The distinctive rock is largely confined to the English county of Hertfordshire but small amounts occur throughout the London Basin. Despite a superficial similarity to concrete it is entirely natural. Like other puddingstones, it derives its name from the manner in which the embedded flints resemble the plums in a Christmas pudding.
  • Bearfort Mountain. Boonton, Rockaway Township puddingstone, is a purple puddingstone found in northern New Jersey. Geologically, it is formed of Paleozoic sandstone and quartz conglomerate.
  • The puddingstone Schunemunk from Schunemunk Mountain in New York. Schunemunk Mountain is an isolated Devonian-age ridge in a sea of Ordovician-age Martinsburg Shale. Note the exceptionally large quartz cobbles. Conglomerates form in near-shore environments, similar perhaps to what beaches look like today in Northern California. The Schunemunk pudding stone was also extensively polished during the last glacial period, which further reveals the unique texture of this rock.
  • Roxbury puddingstone Conglomerate has been significantly altered by metamorphism. Metamorphism has altered its sedimentary rocks to subgreenschist facies and created a slaty, well-developed, spaced cleavage that oriented approximately perpendicular to bedding within it. Typically, tectonism has flattened, stretched, indented, and fractured the pebbles and associated matrix of the Roxbury Conglomerate to the point that it often has the appearance of flow structure.
  • St. Joseph Island puddingstone, found in the St. Mary's River area of Northern Ontario contains red and brown pieces of jasper, a kind of quartz.
  • Drummond Island, Michigan: Millions of years of geologic process result in puddingstone, a metaconglomorate made up of brightly colored jasper pebbles in a quartzite matrix. Unique to the bedrock of the western end of the North Channel of Lake Huron, it was moved and dropped by glaciers across the Michigan landscape, especially on Drummond Island, and as far south as Ohio and Kentucky. A product of chemical sedimentation and volcanic activity, the jasper in puddingstone is a siliceous rock, colored by metal oxides such as iron and magnetite resulting in the brilliant reds and blacks typical of Drummond Island puddingstone. It was named by 19th century English settlers who were reminded of the fruit-filled puddings of their native land.

To log this as a find, you must message me the answers to these questions:
1)What type this pudding stone this is?
2)How did this pudding stone get to this area? (IE: Where was it formed and how it got here.)
3)At Reference point ONE, How many stones are in one square foot. (12" x 12")
4)At Reference Point TWO,(north side) How many stones are in one square foot? (12" x 12")
5)At Reference point TWO.(south side) Observe the boulders and tell me what is NOT like the others.
6)Take a picture of you (or any part of you) or your GPSr with the stone and post it in you log. (optional)



You can use the posted coords for parking and to find the trail-head. There is a small sample of puddingstone here as well. From here continue East to the two reference points to check out the larger samples.

Additional Hints (No hints available.)