description:
|
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Class boundaries:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Many adjacent substrate classes do not have a discrete boundary, but rather a gradient from one class to another. As a result, the boundaries between adjacent classes visible in this dataset are not exact, but rather an estimated midpoint between two mixed classes. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Class uniformity and data resolution:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Within individual polygons, there are often small patches of varying other substrate classes, creating a mosaic of substrate types. To accommodate, any substrate area less than roughly 50 Ft. at its longest side was combined with the closest like class. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Substrate Classification: </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>**Diameter of clasts is defined by the longest edge along the clast**</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Format: Name - Coded Domain (Long Integer) </SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN>Description</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Bedrock – 2</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN><SPAN>75% of the surface is covered by bedrock of any composition, commonly forming bluffs and headlands.</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Boulder – 3</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN><SPAN>75% of the surface is covered by clasts >256mm in diameter</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Cobble – 4</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN>75% of the surface is covered by clasts 64 to 256mm in diameter</SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Coarse gravel – 5 </SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>75% coarse gravel 16-64mm in diameter</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Coarse gravel with fines – 6</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>50% coarse gravel and >25% sand and fines, <25% fine gravel <6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed gravel – 7</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN>>35% coarse gravel and >35% fine gravel, <10% sand and fines, <6%cobble</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Fine gravel – 8</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>75% fine gravel 4-16mm</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Fine gravel with sand – 9</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>50% fine gravel and >25% sand and fines, <25% coarse gravel and <6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Mixed gravel and fines – 10</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts coarse gravel, fine gravel, and sand and fines, <6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Cobble with coarse gravel – 11</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>50-75% cobble and >25% coarse gravel</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Coarse gravel with cobble – 12</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>50-75% coarse gravel and >25% cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed coarse – 13</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts coarse gravel, fine gravel, and cobble, with no sand and fines</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed course and fines – 14</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts cobble, coarse gravel, fine gravel, and sand and fines</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Fines with Gravel – 15</SPAN></SPAN></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Poorly sorted mud, silt, sand, gravel, and cobbles, with no one clast size comprising more than 75% of the surface area. Cobbles and boulders make up more than 6% of the surface area or gravel, cobbles, and boulders combined make up less than 55%. May overlay hardpan in erosional zones with glaciomarine drift or compacted till source material. Usually rich with epibenthic fauna.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Sand – 16</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>85% sand</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Sand with fine gravel – 17</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>60% sand and fines and >25% fine gravel</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed Fines – 18</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Fine sand, silt, and clay comprise 75% of the surface area, with no one size class being dominant. May contain rare gravel (<15%). Cobbles and boulders make up less than 6% of the surface cover. May contain shells. Walkable.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mud – 19</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Silt and clay comprise 75% of the surface area. Often anaerobic, with high organics content. Tends to pool water on the surface and be difficult to walk on. May contain minor amounts of very fine sand. </SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Organics – 20</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Mixed fines or mud with 40% or more visible, intact plant parts in the matrix.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Artificial – 21</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Anthropogenic structures replacing natural substrate within the intertidal zone, including boat ramps, jetties, fill, and pilings.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Driftwood – 22</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Accumulations of driftwood visible in the air photo where approximately 50% or more of the surface area appears to be wood.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Sand with sand shrimp – 23</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>>85% sand with abundant sand shrimp holes. Difficult to walk on</SPAN></SPAN></P></DIV></DIV></DIV> |