clay, as well as silty sands and gravels that were placed as discontinuous 

 recessional moraine segments and outwash fans. Holocene sediments consist 

 primarily of organic sandy muds that are accumulating in low-energy areas 

 where tidal currents and wave action are minimal. 



Fourteen shoal areas distributed around the Sound were found to offer the 

 highest potential as sources of sand and gravel. Based on the seismic data 

 and core results, these resources are conservatively calculated to be 189 

 million cubic meters in water depths less than 20 meters. 



52 



