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Age of Atlantic islands, as indicated by the oldest rocks found on them apparently tends to ncrease with increasing distance from the Mid-Atlantic Ridge. The numbers associated with the islands give these ages in millions of years. Geologists divide Iceland into three areas of different ages, the central one being the youngest. Islands that have active volcanoes are represented by black triangles: most of these lie on or near the Mid-Atlanric Ridge (J.T. Wilson, 1963, Sci. Amer.)

Agate, Brazil. Banded grey agate, crystalline quartz and amethyst

WOK 18-147
Item
[1964]

Part of W.O. Kupsch fonds

Agate, Brazil. Banded grey agate, crystalline quartz and amethyst.

Aero Relief map of the world in colour

WOK 12-70
Item
1960

Part of W.O. Kupsch fonds

Aero Relief map of the world in colour.

Aerial view of washboard moraine re-entrant

WOK 2-87
Item
[1951-1957]

Part of W.O. Kupsch fonds

Aerial photograph of a washboard moraine (minor recessional ridges or swells and swales) re-entrant as indicated by the V-shaped indentation of the ridges. Sec. 24, T. 12, R. 10, W. 2.

Aerial view of washboard moraine forming a re-entrant

WOK 2-94
Item
[1951-1957]

Part of W.O. Kupsch fonds

Aerial photograph of washboard moraine forming a re-entrant or V-shaped indentation, toward the retreating ice sheet. Note kame in the south part of sec. 19. Sec. 19, T. 8, R. 7, W. 2.

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