This is a drawing of the interior of Uranus.
Click on image for full size
NASA
The Structure of Uranus' Interior
There is no surface to the giant planets, only a gradual transition from the atmosphere, as depicted in this drawing. Therefore the giant planets do not have strict layers, as the terrestrial planets do.
Ice begins forming in the atmosphere of Uranus and keeps increasing until there is slush, and then solid ice. There is not much difference between the atmosphere and the ocean, unlike the earth, where there seems to be a surface.
You might also be interested in:

The Giant planets do not have the same kind of structure inside that the terrestrial planets do. Their evolution was quite different than that of the terrestrial planets, and they have much more gas and
...more
In astromony, it is a usual procedure to calculate the luminosity of a star, and this calculation indicates the energy and the temperature of the star. When the luminosity of the outer planets was calculated,
...more
Motions, or currents in the interior of a gas-giant planet such as Uranus may be very different from the motions typical of the Earth's interior. A second idea for the motions in the interior of a gas-giant
...more
Motions in the interior of a planet help carry heat from the inside to the outside. The drawing to the left illustrates the kind of movements that happen in interior of a planet. Material rises from the
...more
Atmospheres of the giant planets have definitely evolved from their formation out of the primitive solar nebula. How much they have evolved remains to be seen, however. Because of their enormous gravity,
...more
The major gaseous constituent of the atmosphere is methane. At the uppermost reaches of the atmosphere, near the thermosphere, methane gas breaks apart due to the influence of energetic photons or charged
...more
Motions in the atmosphere include wind. The major winds in the Uranian atmosphere are the zonal winds which consist of westward flowing zones and eastward flowing belts. The other major means of motion
...more
This is the temperature profile of Uranus' entire atmosphere. The horizontal lines indicate the boundaries between the troposphere, the stratosphere, the mesosphere, and the thermosphere.
...more