Geology of the Moose River Gold District, Halifax 

 County, Nova Scotia. *^ — By Prof. J. Edmund Wood- 

 man, S. D., School of Mining a nd Mffalliin/y, Dal- 

 Jiousie University, Hdllfax, N. S. 



(Read mh May, maj 

 CuNTKNTS. 



Introcliictioii— paor 



Location 19 



Extent and topography 20 



Division into units of area 20 



Methods of approach to subject 21 



Nomenclature 22 



Acknowledgments 23 



Part 1. St7-i(cture. 

 Data for structural interpretation- 

 Absence of fossils 2t 



Lithologii-al horizons 24 



Intcrbfdded \tins. and distribution of 



strikes and dips 25 



Sediments- 

 General distribution 25 



Characteristics 26 



Slates 2G 



Quartzites 2H 



Contacts of strata 27 



Folds- 

 Position of the two main anticlines. . . 27 

 Union of anticlinal axes west waid . 27 

 Stratigraphic position of Moose River 



district 28 



Details at ''West Mine" 29 



Location of axes in main district — 30 



Division i 32 



Attitude and chai-acter of strata . . 32 



Interpretation of structure 33 



Division ii 34 



North anticline 34 



Westward pitch of north anticline 35 



Subsidiary fold, pitching east 35 



South main fold 36 



Relation to Division i 36 



Division iii 37 



North anticline 37 



Subsidiary compound fold 37 



Sotith anticline 38 



Details from trenches 38 



Intcriirctation,and correlation with 



Division ii 39 



Division iv 40 



Subsidiary and south anticlines ... 40 



Axial dips and plunges 41 



Correlation witli Di\ision iii 41 



Summary of Mouse Iti ver folding 42 



Faults— FA OK 



Classes of movements 42 



West fault 43 



Course 43 



Details of di.splacemenls 44 



Direction of motion 44 



Middle fault 47 



Course and attitude 4T 



Disi)laccni(>nts 47 



Southern limit of dislocation 4S 



Essential unity of Divisionsii and iii 49 

 Direction and character of move- 

 ment 49 



East fault 51 



Course : aspect at east quarry 51 



Displacements in southern part of 



field 51 



Explanation of movements, and pre- 

 sent attitude of Division iv 52 



Minor faults 53 



Joints 54 



Metamorphism — 



Dynaniie eharaeter -5 



Secondary minerals ,55 



Cleavage and sehistosity 56 



Recent weathering 58 



Part 



Veins 



Composition — 



Constituents 



Arrangement of minerals 



.59 

 59 



Distribution— 



Stratified leads 60 



Erratic veins 60 



Attitude — 



Relation to belts of strata 61 



Angulars 61 



Confinement to one side of a fold . .. 62 



Crenulations 63 



Relation to .stratification 63 



Variations in size and .shape 63 



Kaulback belt of angulars 64 



Effects upon secondary structures . 65 



Cross A'eins 66 



Rolls 67 



Details of contacts . 6ii 



*The third of a series of papers on the gold-bearing rocks of Nova Scotia ; extracted 

 and altered from a thesis accepted for the Doctorate of Science at Harvard University 

 in 19n2. entitled " Geology of the Moose River district, Halifax county. Nova Scotia ; 

 together with the pre-Carboniferous history of the Meguma serie.s." The first two 

 papers appeared in the American Geologist, 1904, vol. xxxiii. 



