Table 1. Sedimentary facies and sediment transport regimes for rims, walls, 



and floors of high, moderate, and low energy canyons along the Outer 

 Continental Shelf of Georges Bank. LGH = canyon length landward 

 from the canyon mouth at the shelf break {200-m isobath); DPH = 

 depth from canyon rim to floor at the canyon mouth; ANGL = slope 

 angle of lower canyon walls at the canyon mouth. 



HIGB EMEXCT CAMTOHS 

 SIM: 



Ua: 13-25 KM DPH: 750-1000 N AHCL: 15-35*^ 



SHELF SAJHHOIAVEL. RIPPLED SAU) III TSAHSIT TO UALLS TIDAL CURRENTS, 



GRAVEL (EAST RIM) STATIOMABY WESTWARD CURREKT 



VERY FINE SAND DEPOSITED AT CAHIOII HEAD (FROM CANYON?) 



HALLS: MANY SILT+CLAY OUTCROPS- 

 MIXED SHELF SAND AND 



SILT+CLAY. RIPPLED 



-EXTEHSIVE BIOEBOSION 

 -m THAMSIT TO PLOOB— 



-AXIALC?) CURRENTS 



FLOOB: 



SAND, RIPPLED, 



MANY LARGE BEDFORMS 



MODERATE EVEBCY CANYONS: 



-TBAMSFOBTED UP-DOWI CANYON STRONG SEMI-DIURNAL 



PIKES SEPAKATEO; SAND DEPOSITED AXIAL CURRENTS 



LGH: B-18 KM DPH: 320-520 H 



ANGL: 8-15'' 



RIM: SHELF SAND+OIAVEL ■ RIPPLED SAND IN TRANSIT TO HALLS TIDAL CURRENTS. 



GRAVEL (EAST RIM) STATIONARY WESTWARD CURRENT 



VERY FINE SAND DEPOSITED AT CANYON HEAD (FROM CANYON?) 



HALLS: SILT+CLAY OUTCROPS 



MIXED SHELF SAND AND- 

 SILT+CLAY, RIPPLED 



-HUBESAYE 3I0ER0SI0N 

 -IN TRANSIT TO FLOOH- 



-AX1AL(?) CURRENTS 



FLOOR: 



SILTY SAND, RIPPLED. - 

 FEW LARGE BEDFORMS 



LOH ENERGY CANYONS 

 RIM: 



-TRANSPORTED DP-DOHN CANYON- 

 FINES RE-SUSPENDED; 

 SAND, SILT, CLAY DEPOSITED 



-MODERATE SEMI-DIURNAL 

 AXIAL CURRENTS 



LGH: 2.5-5 KM DPH: 200-300 H ANGL: 4-7° 



SHELF SAND+GRAVEL, RIPPLED SAND IN TRANSIT TO HALLS- 



?GRAVEL I EAST RIM) IF CANYON INCISES SHELF ? KM 



-TIDAL. WCR(?) CURRENTS 

 -?HESTWARD CURRENT 



HALLS: FEW SILT+CLAY OUTCROPS 



MIXED SHELF SAND AND 



SILT+CLAY, FEW RIPPLES 



-MINOR BIOEBOSION 

 -IN TRANSIT TO FLOQR- 



-AXIAL(?), WCR(?) CURRENTS 



FLOOR: 



SILTY SAND, FEW RIPPLES , - 

 NO LARGE BEDFORMS 



-SAND, SILT, CLAY DEPOSITED— 



-WEAK SEMI-DIURNAL 

 AXIAL CURRENTS 



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