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.
â¢ Safari is a popular free web browser that is developed by Apple and comes installed by default on MAC OS X Systems. â¢ Click the address bar of any browser installed on your system and type apple.com/safari. â¢ Check Free Download button on the site and click on it to begin downloading.