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2. Ball-and-pillow structures - Wikipedia

   en.wikipedia.org/wiki/Ball-and-pillow_structures

   The first record of these structures was in 1916, when Smith wrote a paper called "Ball or Pillow-form Structures in Sandstones." Here he referred to these deformations as pillow-forms or ball structures. The actual term "ball-and-pillow" came from Potter and Pettijohn (1963), when they cited Smith's work incorrectly. [4]

3. Pillow lava - Wikipedia

   en.wikipedia.org/wiki/Pillow_lava

   This process produces a series of interconnecting lobate shapes that are pillow-like in cross-section. [8] The skin cools much faster than the inside of the pillow, so it is very fine-grained, with a glassy texture. The magma inside the pillow cools slowly, so it is slightly coarser-grained than the skin, but it is still classified as fine grained.

4. Lava - Wikipedia

   en.wikipedia.org/wiki/Lava

   Lava domes are formed by the extrusion of viscous felsic magma. They can form prominent rounded protuberances, such as at Valles Caldera. As a volcano extrudes silicic lava, it can form an inflation dome or endogenous dome, gradually building up a large, pillow-like structure which cracks, fissures, and may release cooled chunks of rock and rubble.

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7. Volcanic history of the Northern Cordilleran Volcanic Province

   en.wikipedia.org/wiki/Volcanic_history_of_the...

   More than 100 eruptions have occurred in the past 20 million years with a broad range of eruptive styles. [2] These volcanic processes have created a range of different volcanic landforms, including stratovolcanoes, [4] shield volcanoes, [5] lava domes [6] and cinder cones, [7] along with a few isolated examples of rarer volcanic forms such as tuyas. [8]