Evening star., 1949-05-25
Million Yeors Of History
Told in SEQ Floor Core
Findings Reported en Ovs.n,.sn,
T.ken From Carthhesn RssFsra
Sy TAs~ss 4. Hswrv

TIE .scsr ~ ssasw fs4n q ~sE4sNAn erAFs ns
eaFte sassSrT - tsAa an ~. fFsss iesszs ece~
q seA @oas essasnea trreu iss acssszs At tas
CAEsasrAr
II sEowA fscsn tsss rvgnA4ssa es ~gnase s~a
nFxsrssssas t22s jesss liar TassaaEaesaa es las
ecnAa Temperature e42Snx the hsax sxtsss 81
so< AGRA ~hseh arec~1es tar rse~sst Fes.
aog acAl sya,
Ihs particular essw ~as gAtAsgwe ey
racA1s o' ns~ ospGh s~a e&yyars nv sAs
Swedish nctr Sea EAS>easg1sa sast ywas u
has a~xr ssis9aea Nv tx Fses r Ff.aesvs @.
tse Neoes soae ONc~4raxtAghse tussaass.
~ssc has segSastra hss aaeaaks Eo tsss Anssg-
etAn uecgssyxacas Caion
Hatls Over CrntaFs~.A
TIE Sea hcttasn ssslAas 10 VERY Asow n .gaa
tlss remains O. marine cygAasGsaA es1as ese
weaes sSEaga from ine surface TIE asezsna-
l&uoa nas bern esIlmAsea a. .fvsn eas een-
t9fnetsf in 800 yrags 30 esas cSa,.rsrGe< IN
! 900 yearS Tatss sas core uaay have REP
resented TIE eoiiding az nsaesss tar a. rHscA
rs 500 .ae0 yvars
The corr ssa@s nf rniegrs Says ~ marked
Shf. from sTopaeA 30 AErtse waiet Tns
!oSSalS IN mere than hail tss aengtA. hcx-
ever, are Of ahsezo~cssantsans new saaaa onay
IN warm Ma Tbs Is interpreted 10 represent
the long period between tive asss and m~cegaa
slasIAt4ons Of TIE iAsa ex ase waea tsn.
pcFatarv al over tire NortheFn HssNisrsssre
was warmer than al present Considerable
evidence O! this has eeea found in land
deposits, but these are maeh more atfsesa.t
10 interpret than the and3stafeed LAYERS es
the ocean bottom
ltaa reasonable assumption n Is StgeAs~a
that sra animals hAve required about The
same climates In the distant past a. tc1as
There have been S!x notable enAnkes Of
Climate since The end Of ire lAxt ice ags
This can be determined from Stady os
fossil pollen deposits In peal hees and lake
bottoms IN New England according 10 q re-
port 10 the American ueopays4cAl Union
here by DR., Arthur &. Knox al the United
States Geological Survey. Approximately 10
sites have been studied 10 date
The climate changes are khown by the
varying types Of predominant vegetation.
First came the Boseal. q cold wet period
while the Ice sheet waS disappearing from
Eastern North America about 10 600 years
ago. Spruce and scrub pine forests covered
much of the landscape,
Periods Of Transition.
Then came a dry period With pine forests
marking a transition from spruce 70 heTn-
lock and declduous trees THIS was fuliowed
quite quickly by the Atlantic period, wettsr
and warmer than the present during which
different types Of forests appeared over the
New ENGLAND area. This was followed hy q
relatively dry period during which heat-lov.
Ing plants enjoyed the best conditions they
have known In this part Of the country. A
wetter and colder period followed with q
general increase In spruce. The next step
was to the present. which is somewhRt
warmer and dryer
The New England picture Df Knox sayx.
seems generally to parallel that shown hy
the peat boss of Northern Europe, Allowing
that the forces producing these climatic
fluctuations acre general over much of the
Northern Hemisphere, The periods arte
OF various lengths from a few hundred 70
more than 2000 years