oceanography pg6.html

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<strong>Sediments of the Shelf </strong></SPAN
></P>
<P style="margin-left:7px">
<SPAN style="color:#000000"
>Most common is sand</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:3px; margin-left:7px">
<SPAN style="color:#000000"
>2mm to 1/16mm</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:3px; margin-left:53px">
<SPAN style="color:#000000"
>(a)    </SPAN
><SPAN style=" font-weight:bold; color:#000000; text-decoration:underline"
>   Terregenous sand: </SPAN
><SPAN style="color:#000000"
>caused by minerals on land particles carried to the</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:124px">
<SPAN style="color:#000000"
>sea by streams ect.</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:55px">
<SPAN style="color:#000000"
>Cape - quarky sand (most common)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:55px">
<SPAN style="color:#000000"
>Fieldspar</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:55px">
<SPAN style="color:#000000"
>Meca</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:3px; margin-left:55px">
<SPAN style="color:#000000"
>Homblande</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:12px; margin-left:55px">
<SPAN style="color:#000000"
>(b)      </SPAN
><SPAN style=" font-weight:bold; color:#000000; text-decoration:underline"
>Calcarenite Sand: </SPAN
><SPAN style="color:#000000"
>made up of shelf fragments - forms corals (CaCOa)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:55px">
<SPAN style="color:#000000"
>(c)       </SPAN
><SPAN style=" font-weight:bold; color:#000000; text-decoration:underline"
>Anthegenic Sand</SPAN
><SPAN style="color:#000000"
> precipitation from sea H2O</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:124px">
<SPAN style="color:#000000"
>Oolites (CaC03)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:124px">
<SPAN style="color:#000000"
>Glauconites (green)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:124px">
<SPAN style="color:#000000"
>Phosphate (brown)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:8px">
<SPAN style="color:#000000"
>Can usually see sand grains individually</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:8px">
<SPAN style="color:#000000"
>Sand usually contains all three types. Sand is named from highest %(percent) present.</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:9px; margin-left:56px">
<SPAN style="color:#000000"
>(2)    Most common type of deposition sediment on the self is mud (or lutite)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:103px">
<SPAN style="color:#000000"
>Diameter of grain is less than 1/16</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(a) Silt (1/16) mm to (1/256) mm</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(b) Clay (less than 1/256 mm)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:103px">
<SPAN style="color:#000000"
>Difficult to see by eye the grains</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:9px; margin-left:104px">
<SPAN style="color:#000000"
>Diagnostic Fracture</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:152px">
<SPAN style="color:#000000"
>Dry species</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:152px">
<SPAN style="color:#000000"
>If holds together = mud</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:152px">
<SPAN style="color:#000000"
>If separates = sand</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:56px">
<SPAN style="color:#000000"
>(3)   Most Common type of sediment is gravel than (4 mm) long</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(a) Gravel = less than 4 mm</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(b) Pebble = 4-64 mm long</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-top:9px; margin-left:56px">
<SPAN style="color:#000000"
>(4)    Volcanic Fragments</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(a) Bombs (larger deposit)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(b) Ash - (dust)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
<P style="margin-left:104px">
<SPAN style="color:#000000"
>(c) Pumice poris SID2 (glass)</SPAN
><SPAN style="font-size:12pt; color:#000000"
> </SPAN
></P>
</DIV>
</DIV><br />
<FONT size="+1" color="#000000"></B>(5) Sea Weeds </P
><P 
 align="justify"
>(6) Mollusks </P
><P 
 align="justify"
>(7) Sponges </P
><P 
 align="justify"
>(8) Hard Rock bottom