A dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across:1  flat wall rock structures, such as bedding. dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across: 1  flat wall rock structures, such as bedding.
Another example would be the âdefault browserâ on your computer. Windows PCs come with Internet Explorer (the blue âEâ icon) as the default browser, just as Apple includes their own Safari browser as the default on their Mac computers.
The default Internet browser for Microsoft Windows systems is Internet Explorer. There are other browsers available that render web pages differently, offer faster launch speeds or expanded features. A few of your options when installing a new browser are Mozilla Firefox, Opera and Google Chrome.