The coconut tree, also known as the Tree of Life, holds a dominant position on Guam's symbol. The shape of the seal is that of a Chamorro sling stone used as a weapon for warfare and hunting. The sling stone was quarried from basalt and coral. The coconut tree, growing in infertile sand, symbolizes self-sustenance and determination to grow and survive under any circumstance, with its fronds open to the sky—defies the elements to bend its will. Its bent trunk attests to a people which have been tested by famine, natural calamities, genocide and foreign wars but have continued to endure as a race. The seal also includes a flying Proa, a seagoing craft built by the Chamorro people, which was fast and agile in the water requiring great skill to build and sail. The river channel, where fresh water rushes out to interact with the ocean, symbolizes a willingness to share the resources of the land with others. The permanence of the land mass of Hila'an in the background demonstrates the Chamorro's commitment to their homeland and environment, be it sea or land. Also in the background, "Two Lovers' Point" juts majestically into the endless waters of the sea, portraying the people's faithful commitment to passing their proud heritage, culture, and language to the endless sea of future generations.