Evening public ledger. [volume] (Philadelphia [Pa.]) 1914-1942, 1917-11-15
THE GRANTEES OF CONNECTICUT

THE United States Geological Survey, Do
i partment Of the Interior, has published
a valuable report on THE GRANTEES OF Con-
necticut." The magnitude Of the granite
industry of New England lends special in'
terest and Importance to this publication
New England granite in the form OF shtu.
ary. monuments, bridges and buildings y
found in almost every part of the United
States and even in foreign countries. 10
nearly all the eastern States, as wel a. ID
cities as distant from New England ~
Vicksburg, Spokane and San Francisco ~
Montreal and in Cuba, these GRANTEES may
be seen in statues or in permanent suue'
lures.
Though the GRANTEES are by no means tns
Oldest rocks, they furnish by far the nara
est and most durable construction stone.
though they differ greatly In hardness
among themselves. Some granites cfus.
under a pressure OF $4,000 POUNDS 70 .n'
square inch; others Withstand pressures q.
ceeding 10000 pounds. The GRANTEES are :.
plutonic origin, resulting from the coonns
of molten rock matter-the magma-wpi0n
was forced upward from the earth's interior.
Before it's intrusion this magma existed -
a fused mass heavily charged WIN ss.."
and therefore under immense pressure. ~,
jected upward by this pressure through sns
among the older rocks, II was changed IRON u
a fused liquid mass to plastic paste MAJ, s..
solidifying and combining at some p,so~
with the older rocks and at these piao~
forming granite rocks such as the ghs'sss,s ",s
These profound disturbances In esny
geologic time produced over much OF ~. ~.
England deposits of granite and gran. IN
rock that Is suitable for economic usv, INA
ranging from statue making to ROAD .,.ss Uu.S
ing. The rocks are of many colors--osTSss' Tss
white. red purple. pink and yeii1w, "a
authors Of the bulletin. T. Nelson Daie sss 80
Herbert f. Gregory, believe that wnen @ w. !
GRANTEES were formed New England W. w..
mountainous region that stood several INV
sand feet higher than the land OF toos' ,,,o
The great cap of overlying rock ses ,s
which the GRANTEES were intruded mas s.'s ~
been largely removed by erosion. 80 -
the granite is now exposed at many pSssh
The presence of this great cover. VII. ss
preyented the rapid cooling OF the maemssi
permitted the formation of the granite -
the molten masses been forced 10 the IA ~
face and exposed to the air they w. W..
have cooled so quickly that the slow pIoSvI p'.sI
Of cryst lllization by which granite lo,u l.s..
would have been arrested by the soa asss.
passage OF the material into the soia ,s,,,sr
a change that forms dense siasS s ,atcns
To that In the obsidian cliffs In feiIowS wssS
park Instead, the molten masses, toIo
inward by great pressure against w1i,
ming of enormous weight. cooled ana n,sss so'
aed slowly enough to permit the co"ps
capitalization OF the liquid or PLASTIC ~. asis
ter. allowing the molecules OF the nins..~
to arrange themselves in the crystalline ~.
in which, as the microscope shows tney
near in granite. The heat Of this mc,
mass must have been very great -
meItn At tsmpsrature Of 5000 oests
$500 degrees tAbreuheit--nulletin
Qoq)o1IQoS QQ>ylx. I v. y