The admittance of the quartz crystal microbalance (QCM) was used to study properties of a liquidlike layer (LLL) at the gold/frozen electrolyte interface. It was shown that in a certain range of temperature, below the melting point, the resonance of the QCM is readily detectable suggesting the presence of a LLL. Treatment of the experimental data within the framework of the models proposed here allowed us to conclude that, depending on the temperature, the LLL exists in two states: at temperatures above -4 degreesC, it can be considered as a viscous liquid, while at lower temperatures down to -7 degreesC, it behaves as a viscoelastic medium. Data handling enabled us to evaluate the temperature dependence of the thickness of the LLL, which increases from a few tens of nanometers at -7 degreesC up to ca. 200 nm at -1 degreesC in the systems studied here (aqueous solutions of 0.1 M Na2SO4 and 0.1 M HClO4).