DRUMLIN A glacial feature usually consisting of a large mound of glacial 

 drift. 



EBB TIDAL DELTA Shoal formed on the seaward side of inlets by ebb 

 tidal currents. 



ECHINOIDS A class of free-moving echinoderms, mostly with rigidly plated 

 bodies. 



EUSTATIC Refers to worldwide changes in sea level due to changes of the 

 volume of water in the ocean or a change in the volume capacity of the 

 basins. 



FJORD A glaciated valley that has been partly drowned by relative sea level 

 changes or as a result of overdeepening by the glacier that formed it. 



FLOOD TIDAL DELTA A shoal complex on the landward side of an inlet 

 deposited by flood tidal currents. 



FORAMINIFERA Protozoans characterized by tests of one to many 

 chambers composed of calcite or of agglutinated particles. 



FRIABLE Weakly consolidated or weathered rock that is easily broken up. 



GEOMORPHIC Pertaining to landforms. 



GLACIAL DRIFT Sediments associated with glacial deposition. 



GLACIOISOSTATIC Vertical crustal movement including depression of a 

 land area due to the weight of overlying glacial ice or elevation of the land 

 due to unloading of glacial ice. 



GLACIOLACUSTRINE Pertaining to glacial deposition or erosion in a 

 lake. 



GROINS Low structures oriented perpendicular to the shore. They are 

 intended to trap or retard alongshore movement of beach material. 



HOLOCENE EPOCH The latest epoch, which began about 10,000 years 

 before present, following the last glaciation. 



HYDRATION Absorption of or chemical reaction with water. 



HYDROLYSIS A decomposition reaction involving water, usually between 

 silicate minerals and aqueous solution. 



IGNEOUS Said of rock or minerals which solidified from molten or partly 

 molten materials. Granite is a common example. 



Appendix A Glossary of Geologic Terms 



A3 



