The surface cools (Niuafo'ou 1989)

06 June (Niuafo'ou ) within release Development of the earth goes into circulation Stamp The surface cools face value 10 Tongan seniti

Stamp The surface cools in catalogues
Michel:	Mi: TO-NI 142

Stamp is square format.

Also in the issue Development of the earth:

• Stamp - The Earth's crust face value 2;
• Stamp - Carboniferous face value 1;
• Stamp - Jurassic face value 2;
• Stamp - Carboniferous face value 57;
• Stamp - Volcanic formations face value 5;
• Stamp - The rivers face value 42;
• Stamp - The Earth's surface face value 1;
• Stamp - Cambrian face value 50;
• Stamp - The rivers face value 32;
• Stamp - The seas face value 15;
• Stamp - Jurassic face value 1.50;
• Stamp - Silurian face value 42;
• Stamp - Pleistocene face value 5;
• Stamp - The surface cools face value 10;
• Stamp - Silurian face value 42;
• Stamp - Carboniferous face value 42;
• Stamp - The mountains face value 20;