f 
| 
or 10 feet 
Surveys of areas in which there are problems of ft vara 
lie importance, such as most, of the basin of the M'ssissipJ 
its tributaries, are made with sufficient accuracy to be in 
lie publication of maps on a scale of (l iu.-h —uoa 
ile), with a contour interval of 10 to 2-5 feet. 
Surveys of areas io which the problems are of minor 
lie importm as much 
an of Arizona or New Mexico, are made with sufficient! 
iracy to be used in the publication of maps on a scale fl 
(1 inch = nearly 2 miles), with a contour interval of 25 ‘ 
feet 
. topographic survey of Alaska, has been in progress sin 
K and nearly 43 per cent of its area has now been raappe 
Territory ri¬ 
ba nee maps on a scale of 
6&JMO? 
or about 10 miles to an 
Most of the remaining area surveyed in Alaska Ins 
h mapped on a scale of £ 5 ^ 00 , but about 4,000 square m^B 
been mapped on a scale of ^ or larger. 
|he Hawaiian Islands, with the exception of th nail 
ids at the western end of the group, have been surveyed, 
the resulting maps are published ou a scale of 
Ihe features shown on these maps may arranged in 'jj4k 
—( 1 ) watc ( .-~ 
other bodies of water; (2) relief, including mountal 
1 , valleys, and other features of the laud surface; ( 3 ) cul 
^IpfrXv iil v odc 11 v iifiarfr‘dffnms JtV ifffq.wa 4 118 y HffEJIS rift 1 
-doptAop puauiiu 04 ‘aplrauxo .xoj ‘Suptq&i—aonc4Jodim otp 
4B&1S jo stuo[qo.td are a.iaq4 qoiqM ux scam jo sXaA.mg • 
: SAiopoj sc pajBpuatojjtp ‘sa 
ao.up 04m papjAip uaaq arcaX Xubui joj aAcq sdeiu 2 uiqnsa.i 
pun .ladord saxrug pojtuQ oqj joj s.Ca.i.ms oiqduffiodo? p.rep 
aq4 ‘sasod.md pBioads .104 sojbos jcioads uo paqsqqnd pne p 
-moo are sdBtn amos puB paXoArns axe scare amos qSnom^J 
•aoBjjne s ( q4.i ca aqj uo sjtun jcjruns 00<?‘g9 apiasaidax (.toj 
X .10 ‘400J x ‘tput x sb qons) darn 9144 uo jtun x jcqj suBaraj 
a [cab arp ‘ajdurexa xoj[ "punooS aq; no sooucjsip Suipuoa 
-joo put? dcur oip uo S4uoui9jnsc3ra .reauq uoa&4aq 014at pox! 1 
ilmssa.idxa uoporuj b A'q u.woqs si dem aq; jo 94 bos aq4 ‘uopbl 
uj * 89 {txu ptre ‘ai949in paaj m eaauB4stp SuiAioqs 894cos oiqd 1 
pajuud arc dciu qoca jo tiffirctn 39.1104 aqj uq •sazts^uaiagin 
scare 4 U 9 saxda.i .19144 ‘axis uuojtun jf[.reau jo are sdem p.tBp 
oq4 q.luotp ‘Apuanbasnoo pire *Xx}imo 9 9144 jo 4natudo4aA94> 
at asn [caauah 04 poidtpc 4saq si qatq.ii jcqx Smaq dcut qoca 1 , 
papxqas a4BOs aqj ‘ea[Bos 4ua.iajjip uo paddetn arc sajSuBjp 
asaqjL •apn4i$no4 jo suBipuaui pun apnipcj jo tqapaicdl 
papimoq sajSrrejpcnb 04111 paptAip si ajjuuoo 9144 [) 94 dopc tf 
[Rianah aq4 japuQ 'saqoui QS Aq 494 jnoqc /hi unseam S4ay 
uo sdetn jo ut.toj atp ui ’ paqerfqnd si sepe oiqdBjSodoj siq v ; 
*SU01SS3< 
* 
SunCpno jo BAisnjoxa ‘Xijunoo aip jo 41100 .iad gp amp al 
jo sdeui {taqsqqud jo jsiauoo 8440sa.i sji 41111? ‘gggx earns ssai. 
ni uaaq seq q.10.11 siq j 'sajejg 4)9410 i_q 9144 40 SB44B oiqdc.xSf 
p.rep urqs c Sniqciu si jCaAing 4co^O|oaf) sa4C4g 4104ttiQ aql 
{eh maps have been published. Over 3,300 quadrau 
United States have been surveyed, and maps of 
Klar to the one on the otlier side of this sheet have 
vii'' tOf)0:;',rap]iic map is the base on -which the geolog 
e text to form a Ibiio of t ?e ideologic A las ot the 
ales. More than 220 folios have been published. 
Index maps of each State and of Alaska and Hawaii ehl 
e areas covered by topographic maps and geologie foih 
bed by tlie United States Geological Survey may be ob 
I 
fferen 
discount of 40 per cent is allowed on an order for 
hOuntilig io fb more at tht reta ) ?>rice. The gc 
are sold for 25 cents or more each, the price depe 
the ei/i? nf rbv tbl, ., A circular describing the tVmJ 
lent on request 
mplications for maps or folios should be accompam 
;h, draft, or money order (not postage stamps I and sko 
! reseed to 
{ THE DIF; 
United State* Geological Survey) 
Washington, 
j September, 1928. 
lum jaxcx 
