The rocks of Atlantic Canada represent almost a billion years of history and rec

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The rocks of Atlantic Canada represent almost a billion years of history and record the tectonic events that have shaped this planet and this region. From mountain building collisions of continents to rifting that split apart the supercontinent Pangea, it is all recorded in the rocks In this assignment we will take a look at the ages and types of some of the rocks that form Nova Scotia. We will be working with the Geology Map of Nova Scotia. This publication contains an amazing amount of information and is recommended for anybody interested in the rocks and geological history of this province. But before we can start we have to understand how to read a geological map How Rocks are Named To identify layers of rock, geologists have created several categories to distinguish one rock layer from another The basic unit in this system of classification is the formation. Often this will be abbreviated to Fm. in usage. The Halifax Formation, or Halifax Fm. for example. A formation is a rock unit that has a distinctive appearance, a geologist can tell it apart from the rock layers around it. Formations will usually have one distinctive type of rock, the Halifax Formation is predominately slate, but that they often include a variety of rock types. Formations must also be thick enough and extensive enough to plot on a map Formations can also be subdivided into smaller units called members (Mb) Formations can also be lumped together into larger units called groups (Gp). The Meguma Group is comprised of the Halifax and Goldenville Formations Members make up formations. Formations make up groups When geologists propose a new name, they must publish a formal description that includes a full description of the rock unit and the location of the type locality. The procedures for classifying and naming rock units are contained in the North American Stratigraphic Code, prepared by the North American Commission on Stratigraphic Nomenclature. All unit names are formal and should be capitalized in use

Explanation / Answer

Answer- From the geological map of Nova scotia, the information about the rock age and name of rock are given below

1- In Halifax city, the rock represented by pink color is plutonic igneous rock (granite, granodiorite and diorite)

age of rock in million year is 1000-436 million year

the age of these rock are Neoproetriozoic to ordovician

2- Meguma group is consist of lower Goldenville formation, Halifax formation

rock represent by the Meguma group is slate, geniss, schist, greywacke

the age of the group is Cambrian to ordovician

the younger formation of Meguma group is halifax formation

3-yellowish green color band of rock near gulf of fundy

the age of the rock is - late Triassic to early Jurassic

the rock is composed of - Basalt, limestone, sandstone and conglomerte

4- the age of oldest rock (ignore igneous rock) is - Helikian 900 million year consist of schist rock

the part of provinces they located- Meguma terrane

the age of youngest rock is cretaceous period 140 million year

youngest part located in - Avalon terrane

5- Cw stands for Carboniferous Windsor group

T stands for Triassic

6- Name of the rock unit - Fundy group

age of rock is Triassic- Jurassic

rock occurs - Sandy limestone, sandstone, basalt

occur in Province - Avalon terrane

7- the unit that under lies is Horton Group

the type of rock - sandstone, Conglomerate, shale, limestone, siltstone,

the age of the rock is - Early carboniferous

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