LANDFORMS AND SURFICIAL GEOLOGY OF THE RANDOM ISLAND MAP SHEET 54OI 00 55I 50I 45I 40I 35I 53OI 30 (NTS 2C/4) OI 48 15 48OI 15 Tb/Tv/O Tb/Tv/O Ge/Fr/Gt Fv/Fe/Rc Te Rc/Tv/O Tv/Rc Rc//Tv Rc/R Ob/Or O Tb/Tv/O Ov Rc/O/Tv Tv/Rc/O Tv/Rc Tv/Rc/O Tv/Rc Rc/R Tb/Tv/O Tl//Tb Tve/Rc Tv/Rc/C Rc//Tv-O Rc/Rr Rc//R Fv/Fe/Rc T Rc Rc/Tv Rrc/Tv Ov Rc/Tv Rc/Tv/R GOVERNMENT OF O/ Ob/Th Ob/Or O Tv/Tb/O Rrc//Tv Rc//Tv-R Gv T Rc Rrc//Tv Rc/Tv Tv/Rc /Ge Tl/Tb Tl Tb/Te/Tv Ob/Or/Rc Tv/Rc Tv/Rc Tve/Rc Rc/R/Tv Rc/Rr Tv/Te R Tv//Rc Te/Tb/O Tv/Rc O//Or O Or/Oe/Ob Tv/Rc/O NEWFOUNDLAND AND LABRADOR Rc O Mv R/R-Tv MAP 2003-01 Tb//Te Tl//Tb O/Tb Tv/Rc Tve/Rc Tv//Rc Tv/Rc Rc/Tv/O Rc//Tv-R Rr/Rc Department of Mines and Energy Tb/Te Ob/Or R/Rc Tv/Rc Georges Brook Te/Tb Ob Te//Tb Or Tv//Rc Tve//Rc Geological Survey Tb/Tv/O Tv/Rc Rc/Rrc Tve/Rc Rc//R-Tv Rc/Rrc LANDFORM CLASSIFICATION Or/Ob AL O Tv/Rc/O GIC SU Mb/Mt Mb/Mt Tb//Te Rc/Tv/R Rr/Rc O R Tv/Te/Rc Tv/Gv Or Rr/Rc L V Tv//Rc-O Tl//Tb R O E GENETIC Or Rc//Tv Tv/Rc/O E Y Mb/Mt Ob//Or G Or//Oe Ob/Or O Tve/Rc/O Rc//Tv-R Rc/Tv/O Rc/Tv/R N Fluvial Colluvial Aeolian Glaciofluvial Lacustrine Marine Glacial Organic Rock Ov Te//Tb-O Tv/Rc R Tb Rc/O E / O W MORPHOLOGY (F) (C) (E) (G) (L) (M) (T) (O) (R) T Ov/Tb Tv/Rc-O Rc/Tv/R Ov/Oe D Rc//Tv O F Tb/Te/O Or Rc Tve//Rc O A Rr/Rc U R (a)apron Ca Tb/Te Rc N B Te/Tb Oe/O Tv/Rc D 1864 A LA L Tv//O Mb Barton Te/Tb/O Tv/Rc N D A N D blanket (b) Fb Cb Gb Lb Mb Tb Ob Tv/Rc Ob/Or/Oe Rc//R O//Tv Rc/Tv Tv/Rc Mv Mb Rc//Tv /Rc Tv//Rc Te/Tb Or/Oe O/Rc R concealed by Rc Mt Rc/Tv/R vegetation (c) Cc Ob/Or/Oe Tv/Rc Mv LANDFORM CLASSIFICATION Tb/Tv Tve//Rc Tv//Rc-O Mv R/Rc Rc/Tv /Rc Rr/Rc R Tb/Tv Tb/Tv Tb/Ov R drumlinoid (d) Td Te/Tb/O O Tv/Rc/O Rc/Tv R/Rc Tv/Rc/O Milton Rc/Tv Gv Fr Rc//R eroded and Tv/Tb /Fv Rc//R Mf Fe Ce Ee Ge Le Me Te Oe Re Tb/O/Te Rrc/Tv/O R Rr Rc/C Each outlined area is assigned a classification consisting of up to three genetic categories and modifiers that designate the dissected (e) Tv/Rc/O O Tl Rc/O/Tv Rc/R Rc/R Te/Tb/Tv Te/Tb/O O Rc/R Tl/Tb Rrc/Tv Rc/R/Tv types of deposits within each area. Each category, within a classification, is listed in order of dominance and is separated from (f)fan Ff Cf Gf Mf Tv//Rc O O Tv/O/Rc R/Rc O Rc/Tv/R the other categories by a slash (e.g., Tv/R). Generally, the areas are divided so that three landforms or deposit types are Tv/Rc Tv Ov O O Tv/Rc Rc/Tv Rr identified within a given area. The classification system is also used to denote the approximate percentage of landforms hummock (h) Eh Gh Th O/Or R // T Tb/Te Tl/Tb/O Ov Tve//Rc Te/Tb/O occurring within an outlined area, but those which compose less than 5 percent of the area are not included in the classification. Te/Tb/O Fv (k)kettle Gk Tk Tv/Rc O/ Rc/Tv/R F/O Rc R//Rc Four variations of the landform system are as follows: Tv//Rrc Tve//Rc-O R Tve/Rc O Rc Mb Tv/Tb Tv/O/Rc 1. Where three different landforms are included in a single map unit they are each separated by a single slash (/) and their (l)lineated El Tl Ol Ob Tv/Tb Rrc/Rc-Tv R/Rc Rc/R Te/Tb/Tv O Tb/Tv Munroe Rc//Tv relative percentagesare (60 - 85), (15 - 35), and (5 - 15) . (p)plain Fp Gp Lp Mp Tp Op Harcourt Tb/Tv/Rc Tv/Rc Rc Gin Cove Tv/Rc Rc/R/Tv 2. Where two landforms are included in a single map unit, a double slash (//) or single slash (/) is used to separate them, Tb/Tv Tb/Te Tv/Rc (r)ridge Fr Er Gr Lr Mr Tr Or Rr Mv Tv/Rc/O Mv and their relative percentages are (85 - 95) and (5 - 15) for double slash, or (60 - 85) and (15 - 40) for a single slash. Mills Siding Tl Ob Ov Mt Tv/Rc/O Rc//Tv- Rr//Rc // Mv / Waterville Tv/Rc T //Mt R Rrc/Tv/O R Rr//Rc R (t)terrace Ft Gt Lt Mt Tt Rt Tv/Rc/O Rrc/Rc/Tv Rc/Tv/O 3. A hyphen between two landform typesindicatesthat they are approximately equal in area. For example, Tv-Rc indicates Ov// Ob Tv//Rc T Rc/Tv/O that till veneer and rock concealed by vegetation or a thin regolith are equal in area. (v)veneer Fv Cv Ev Gv Lv Mv Tv Ov Te/Tb Shoal Rc/Tv/O Rrc/Rc-Tv O/Rc Mv F/G //Mt Tv/Rc R/Rc Harbour R Rc/Tv/O 4. A composite symbol is used to show combinations of the above cases. For example, indicates that about 60 - 85 weathered (w) Rw Tve//Rc T Tv/Rc/O percent of the area is covered by fluvial sediment, 15 - 40 percent by glaciofluvial sediments, and is underlain by till. Tv M I T Rc/R/Tv Ge//F M //Rc S H complex (x) Gx Lx Mx Tx R Tb//Tv-O Te/Tb/O undivided F C E G L M T O R Ge//F Rc Rc/R The striationdata reported on thismap hasbeen referenced from the Newfoundland Striation Database(Taylor, 2001) O Tv//Rc Or Tv/Rc/O Rc/Tv/O // Rc//Tv Rc//Tv T Rrc/Rc-Tv Rc/Tv Tb/Te Tv/Rc/R Rc//R-C LANDFORM CLASSIFICATION: GENETIC SYMBOLS Clifton Tv/Rc/O Rc/R/Tv Rc/R M/O Rrc/Rc/Tv Rc/R/Tv Tv/Tb/Rc Tv/Rc D Geological boundary (assumed) .................................................................. Rc//Tv Depositional Tb//Te-O Tb/O 500 Rc/R O/Or N Rrc/Tv Rc/Tv Symbol Environment Origin and Characteristics of Materials Geological boundary (gradational) ..................................................... ........... Rc//R-C Rrc/R/Tv U Rc/Tv/R Rc/R/Tv l l Rc/Tv/R-O Rr/Rc-O l l O Tv/Tb/Rc S O Rrc/R/Tv l l I I Scarp face at edge of fluvial terrace ............................................................... l l 10 Rc//Tv 10 F Fluvial Alluvium consisting of silt and clay to bouldery gravel, forms terraces and plains l O Aspey Rc/Tv/R Rr/R/Rc Clarenville Te/Tb/O Rc//R associated with modern stream channels, their floodplains and deltas; usually less O Brook O Esker (flow direction known or assumed, unknown) ................................................... Tv/Rc/R v Tv//Rc Tv/Rc Burgoyne’s than 1 m thick; deposited by fluvial action at or below maximum flood levels T Tv/Rc/O Cove Rc/Tv Meltwater channel (small, large) ................................................................. Tv/Rc O Rc//R Tv/Rc Rc/Tv M/Mt O//R Rc/Rrc C Colluvial Colluvium consists of coarse-grained bedrock derived materials, but may Tve//Tb Snooks Tv/Rc Te//Tv Aspen Rc/R include sand, silt or clay, accumulates on the lower parts, or at the base of steep Crestline of major moraine ridge .................................................................. O Harbour Rc/Tv R/Rc/O R/Rc/O Rc/R/Tv Tv//Tb-Rc Tb//Te-O rock faces; transported by gravity Tv/Rc Rc/Tv Rrc//Tv-O Mv/Mt/Rc Tv/Tb/Rc O O Trend of ribbed or minor moraine ridges ............................................................ Petley Mv/Fv Rc//Tv-R Rrc//Tv Rc/Tv Tv/Rc Rc/R/Tv-O E Aeolian Medium to fine grained sand and silt, well sorted, poorly compacted; commonly occur O O/Tv Rrc/Tv-R Rrc//Rc/O Tv//Tb-Rc O Tv//Rc Rrc/R/Tv Beach ridges ................................................................................. Gv Te/Tv/Rc Rc/R asdunesup to 10 m high; transportedand depositedby wind Ge O Tv/Rrc Rc//Tv / Tb//Te-O Tv/Rc O Tv/Rc/O T O M Rc/R Crevasse fill ridge ............................................................................. O Tv/Rc/O Rc/Tv Rc/Tv Rr/R/Rc G Glaciofluvial Fine grained sand to coarse grained cobbly gravel occur as plains, ridges (eskers), Tve//Tb Tv/Rc/Tb Tv//Rc Britannia Tv/O Mr O Tv/Rc Tb/Rc hummocks, terraces and deltas; generally greater than 1 m thick; deposited as Tb//Te-O 50 Sand dunes .................................................................................