The spouse of Aulë is Yavanna, the Giver of Fruits. She is the lover of all things that grow in the earth, and all their countless forms she holds in her mind, from the trees like towers in forests long ago to the moss upon stones or the small and secret things in the mould. In reverence Yavanna is next to Varda among the Queens of the Valar. In the form of a woman she is tall, and robed in green; but at times she takes other shapes. Some there are who have seen her standing like a tree under heaven, crowned with the Sun; and from all its branches there spilled a golden dew upon the barren earth, and it grew green with corn; but the roots of the tree were in the waters of Ulmo, and the winds of Manwë spoke in its leaves. Kementári, Queen of the Earth, she is surnamed in the Eldarin tongue.
The Helcaraxë, also referred to as the Grinding Ice, was a large glacier connecting Aman and Middle Earth during the First Age. It is described as a frozen wasteland and a bridge between the two worlds. It was first noted as the escape route of Melkor and Ungoliant after they defiled the Two Trees and were being hunted by the Valar. It was later part of the mass exodus of Noldor from Valinor into Middle Earth. Fëanor had rallied his people to war against Morgoth for the Silmarils, and turned his back on the Valar. He led his host to the shores of Aman, seizing the boats from the Teleri in the First Kinslaying with aid from the host of Fingolfin. With these boats he lead his own host across the sea to Middle Earth, but when they landed in Beleriand, they burned the ships -stranding Fingolfin’s people in Aman. Fëanor believed them to be useless, and still
hatred for Fingolfin from an earlier feud. Fingolfin refused to return to the Valar in shame after having followed Feanor, and in a curse to Fëanor’s name, and lead his people north to cross the Helcaraxë, to meet him in Middle Earth. Among the people that crossed were Galadriel and Finrod. Among those who died were Elenwë, wife of Turgon, and many others.The Helcaraxë was destroyed during the War of Wrath, along with most of Beleriand. A modern world comparison would be the Beringia land bridge formed millions of years ago, where humans from Asia migrated into North America.
“The Noldor came at last far into the north of Arda; and they saw the first teeth of the ice that floated in the sea, and knew that they were drawing nigh to the
Helcaraxë, For between the land of Aman that in the north curved eastward, and the east-shores of Endor (Which is Middle-earth) that bore westward, there was a narrow strait, through which the chill waters of the Encircling Sea and the waves of Belegaer flowed together, and there were vast fogs and mists of deathly cold, and the sea-streams were filled with clashing hills of ice and the grinding of ice deep-sunken. Such was the Helcaraxë, and there none yet had dared to tread save the Valar only and Ungoliant.” – The Helcaraxë description, Of the Flight of the Noldor, The Silmarillion.